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Finasteride 0.1% in Trichosol topical hair loss solution

from£29.99

A personalised topical hair loss solution containing finasteride 0.1% in a Trichosol base free from propylene glycol and alcohol. Designed for adults who want a gentle, single-ingredient approach to compounded finasteride treatment at a clinically considered mid-range concentration. Applied using a dropper bottle at night and washed off in the morning.

  • Propylene glycol FREE
  • Alcohol FREE
  • Single active ingredient
  • Pack size: 30ml bottle, around one month’s supply
  • Expiry date: 180 days from compounding date
  • Prescription only

TREATS:

Hair Loss

FORMAT:

Topical solution

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In stock

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Finasteride 0.1% in Trichosol topical hair loss solution
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Description

Finasteride 0.1% in Trichosol (propylene glycol and alcohol FREE) topical hair loss solution — Product description

The problem with hair loss

Hair loss is easy to dismiss until it happens to you. The visible signs are familiar: thinning at the crown, a wider parting, or a hairline that starts moving in the wrong direction. However, the less visible impact often feels even harder to manage. Confidence dips. Self-consciousness creeps in. Over time, the worry that things are getting worse — and that nothing you have tried so far has made a real difference — can become part of daily life.

The problem with standard treatments

For many people, the frustration goes beyond hair loss itself. In fact, it often comes from the treatment experience.
Standard topical liquids can sting as soon as you apply them. Alcohol hits the scalp before the formula has time to settle. Meanwhile, propylene glycol can leave behind a tight, uncomfortable residue that lingers for hours. After a few weeks, skipping an evening can feel less like failure and more like self-preservation.
Unfortunately, that is exactly what gets in the way. If treatment feels unpleasant, consistency becomes harder. And without consistency, hair loss treatment is less likely to deliver the results you want.

Why choose a single-ingredient approach?

Not every patient needs a combination formula. Instead, some people want to focus treatment entirely on finasteride and target the hormonal driver of hair loss directly. Others start with this formula because a clinical assessment or TrichoTest result shows that finasteride alone, at a carefully selected concentration, is the most appropriate option for their individual profile.
A single-ingredient compounded solution is not a compromise. Rather, it is a deliberate clinical choice.

Why Trichosol?

Trichosol removes both propylene glycol and alcohol from the base. As a result, you avoid stinging, tightness after application, and the sharp alcohol smell that many standard solutions leave behind. Instead, you get the active ingredient in a vehicle that the scalp is more likely to tolerate comfortably.
That matters, because hair loss treatment only works when you can use it consistently — night after night, for as long as treatment is needed.

Why 0.1% finasteride?

This formula contains finasteride at 0.1%, which sits in the mid-range of compounded strengths. Your prescriber chooses this concentration when your clinical assessment suggests it is the right starting point or the right ongoing strength.
For some patients, it offers a sensible entry point into compounded finasteride treatment. For others, a TrichoTest result may suggest a moderate anti-androgen requirement. In other cases, 0.1% remains the right long-term concentration because it matches the patient’s response and tolerability.
So, this is not a default strength. It is a clinical decision made for you, specifically.

A medically responsible route

At Courier Pharmacy, treatment starts with a proper assessment. We check suitability carefully. Then, if appropriate, a UK-qualified prescriber makes the prescribing decision based on your scalp, your history, and your goals.
  • Prescription-only compounded Trichosol solution for pattern hair loss
  • Propylene glycol free and alcohol free for a gentler daily experience
  • 0.1% finasteride as a mid-range concentration chosen for the individual
  • Reviewed for suitability by a UK-qualified prescriber

Additional information

Quantity

1 x 30ml, 2 x 30ml, 3 x 30ml, 4 x 30ml, 5 x 30ml, 6 x 30ml

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Overview

Active ingredients

What is it for?

How does it work?

How do you use it?

Warnings and precautions

Side effects

Drug interactions

FAQs

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Written By
Shazlee Ahsan
BSc Pharmacy, Independent Prescriber, PgDip Endocrinology, MSc Endocrinology, PgDip Infectious Diseases

Superintendant Pharmacist, Independent Prescriber


Checked By
Safdar Ali
BSc Pharmacy

Pharmacist


What is Finasteride 0.1% in Trichosol topical hair loss solution?

This compounded topical hair loss solution contains finasteride 0.1% in a Trichosol base that is completely free from propylene glycol and alcohol. It is designed for adults with pattern hair loss who want a targeted, single-ingredient approach — particularly those who need a gentler base because standard topical products have caused irritation, or those whose clinical profile indicates that finasteride at 0.1% is the most appropriate concentration. The aim is straightforward: address the hormonal driver behind hair loss at a carefully selected finasteride concentration, in a base the scalp can actually tolerate.

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  • Single active ingredient targeting the root hormonal cause of pattern hair loss
  • Propylene glycol free, alcohol free Trichosol base for a more comfortable daily experience
  • Finasteride at 0.1% — a clinically considered mid-range concentration
  • May suit people with androgenetic alopecia whose scalps have reacted to standard topical bases
  • Safe prescribing still matters — hair loss treatment needs proper screening, review, and follow-up
  • Part of the Gro hair loss range, designed for personalised treatment at less than £1 per day

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Pattern hair loss is personal

Pattern hair loss is common, but that does not make it any less personal. Many people first notice extra shedding, reduced density, or a hairline that seems to be quietly retreating. Many then try a product that does not match their biology, see little result, and quietly give up — not because treatment cannot work, but because they were never on the right treatment to begin with.

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A formula for people who need a gentler, focused approach

This Trichosol solution is aimed at people who want a carefully considered, single-ingredient approach to targeting the hormonal driver of hair loss — in a base their scalp can genuinely tolerate. It is particularly relevant for those whose prescriber has identified 0.1% as the most appropriate finasteride concentration, and those who have previously reacted to alcohol or propylene glycol-based products.

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The goal of treatment

Hair loss affects more than appearance. It chips away at confidence. It makes ordinary moments feel oddly loaded — a harsh bathroom mirror, a photo taken from an unexpected angle, a windy day when you would rather not think about what is visible.

The goal of treatment is not perfection. It is to slow loss, support healthier growth, and help you feel more in control — with a plan that makes clinical sense and a base that makes daily use something you can actually stick to.

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The Trichosol advantage

When the vehicle is the problem

For patients who have reacted badly to standard topical solutions, the problem is not always the active ingredients. Often it is the vehicle carrying them. Alcohol causes stinging on application and dries the scalp significantly over time. Propylene glycol is a common cause of contact irritation, particularly in patients with already sensitive or reactive scalps.

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What Trichosol removes

The Trichosol base removes both of these excipients entirely. The result is a solution that absorbs without stinging, does not dry the scalp, and does not leave the tight or uncomfortable residue that causes so many people to abandon their routine. The active ingredient is unchanged. Only the vehicle is different — and sometimes that difference is everything.

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Why tolerability drives outcomes

A treatment only works if you use it consistently. If the daily experience of applying it is uncomfortable, consistency breaks down. The Trichosol base exists to remove that barrier — making it possible to maintain the kind of steady, sustained daily routine that hair loss treatment requires.

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Why the Trichosol vehicle matters

The Trichosol base is clinically relevant as well as practically comfortable. It removes the excipients most likely to cause scalp irritation — making it possible for patients to apply their treatment consistently, which is one of the most important factors in whether any hair loss treatment succeeds over time.

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Why compounding?

What compounding means

Compounding means a medicine is prepared to order by a licensed pharmacy for an individual patient. It is not a mass-produced one-size-fits-all product. In the UK, this sits within a regulated framework and should only be supplied when clinically appropriate.

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Why compounding matters for this formula

Some people choose a compounded solution because the concentration they need — such as 0.1% finasteride — does not exist in any standard licensed product. Others come to compounding specifically because standard topical bases have caused irritation and they need the active ingredient delivered in a gentler vehicle. Others want the clinical flexibility to start with a single ingredient and build their formula over time as their treatment plan evolves.

The Trichosol base addresses the tolerability concern directly. It removes both propylene glycol and alcohol — the two most common causes of topical scalp irritation — without reducing the effectiveness of the active ingredient.

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Personalised medicine in practice

Hair loss is not identical from one person to the next. The right finasteride concentration for one patient is not the right concentration for another, and the right number of ingredients at one stage of treatment may not be right at another. Compounding makes it possible to prescribe 0.1% finasteride alone — a strength and formulation that simply does not exist in any standard licensed product — when clinical assessment indicates that this is the most appropriate approach. The medicine is shaped around the patient, not the other way around.

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Why single-ingredient treatment can be the right choice

Not every patient needs to start with a combination formula. For some, a single-ingredient approach at a carefully selected concentration is the most clinically appropriate way to begin. It allows the prescriber to assess individual response before expanding the formula. It may also reflect TrichoTest findings that indicate finasteride alone — at this specific concentration — is the best-matched approach for the individual’s genetic profile and treatment history.

If response is good, the formula can be built upon over time. If additional ingredients are indicated from the outset, TrichoTest and clinical assessment will guide that decision. Compounding makes either path possible.

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TrichoTest: personalising the approach

TrichoTest reduces guesswork. It is a pharmacogenetic test that analyses 26 genetic polymorphisms linked to nine key treatment pathways relevant to hair loss. Rather than prescribing from standard protocols alone, TrichoTest combines your genetic profile with your medical history to predict which ingredients, dosages, and delivery methods are most likely to work for your biology.

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How the TrichoTest informs the 0.1% finasteride concentration

The 0.1% finasteride concentration is one area where TrichoTest is particularly valuable. Some patients have genetic profiles that suggest a moderate anti-androgen requirement — meaning 0.1% is the most appropriate concentration for their biology, sitting neither at the lowest nor the highest available strength. TrichoTest can identify this before treatment begins, helping the prescriber choose the right concentration from the outset rather than adjusting after months of treatment.

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How the TrichoTest informs this formula

If TrichoTest identifies a moderate response to anti-androgens, the prescriber may determine that finasteride 0.1% alone is the most clinically appropriate starting point — before deciding whether additional ingredients are indicated.

If the test reveals factors that would make a combination formula more beneficial from the outset — such as poor minoxidil response or low collagen synthesis capacity — the prescriber may recommend a multi-ingredient formula instead, or plan to expand this one over time.

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The nine pathways TrichoTest analyses

  • Prostaglandins and sulphotransferase — how you process minoxidil and latanoprost
  • Anti-inflammatory response — your reaction to glucocorticoids and immunomodulators
  • Anti-androgen metabolism — how effectively you respond to dutasteride, finasteride, and 17?-oestradiol
  • Circulation stimulation — response to vasodilators
  • Collagen synthesis capacity
  • Insulin-like Growth Factor (IGF-1) response
  • Vitamin absorption — A, B7, B9, B12, C, D, E
  • Mineral absorption — zinc, magnesium, iron, selenium
  • Antioxidant needs and oxidative stress profile

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Beyond ingredient selection

TrichoTest also identifies nutritional gaps and metabolic factors that affect hair health independently of topical treatment. If genetic variants reduce zinc or iron absorption, the prescriber can recommend targeted supplementation alongside this Trichosol formula — moving treatment from guesswork towards something shaped by your actual biology.

TrichoTest does not guarantee results, but it gives the prescriber better information to decide whether this specific formula — at this specific finasteride concentration, in this specific base — is right for you, or whether something different would serve you better.

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The Gro hair loss range

What is the Gro brand?

Gro is the compounded hair loss range created by Courier Pharmacy and Medical Mojo. It exists because hair loss treatment should not feel one-size-fits-all.

Some people want a traditional liquid spray — direct, efficient, and familiar. Some prefer a foam. Others need an alcohol-free and propylene glycol-free base because their scalp reacts to standard excipients. Gro brings those options together under one brand, matching treatment to the person using it, not the other way around.

Each Gro product comes in a 30ml bottle designed to last one month. Every option costs £29.99 for up to three active ingredients — less than £1 a day.

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Why Gro is different

Gro was built around three practical goals:

  • Choice of formulation: topical liquid, topical foam, or Trichosol solution (propylene glycol free and alcohol free)
  • Personalisation: single, dual, and triple-ingredient combinations across multiple concentrations
  • Better tolerability: every format is designed to reduce the friction that stops people from maintaining their routine

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The three formulation types

  1. Topical hair loss liquid — a traditional spray solution containing alcohol and propylene glycol. Well-established, with efficient scalp penetration. Chosen by patients who want a direct, familiar format.
  2. Hair loss foam — lighter, faster-drying, and easier to apply without dripping. Chosen by patients who want clinical results in a format that fits more easily into daily life.
  3. Trichosol topical solution — propylene glycol free and alcohol free. Designed for patients with sensitive or reactive scalps who need a gentler base. This is the formulation described on this page.

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Ingredients used across the Gro range

Depending on the product selected, Gro formulations may include:

  • Dutasteride
  • Finasteride
  • Minoxidil 5%
  • Tretinoin 0.01%

These can be prescribed alone or in combination, and at varying concentrations, depending on the individual treatment plan.

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Gro product options

The Gro range includes the following compounded hair loss options, each supplied as a 30ml one-month bottle at £29.99.

Dutasteride + Minoxidil + Tretinoin
  • Dutasteride 0.05%, minoxidil 5%, tretinoin 0.01% — topical liquid
  • Dutasteride 0.05%, minoxidil 5%, tretinoin 0.01% — topical foam
  • Dutasteride 0.05%, minoxidil 5%, tretinoin 0.01% in Trichosol — topical solution
  • Dutasteride 0.1%, minoxidil 5%, tretinoin 0.01% — topical liquid
  • Dutasteride 0.1%, minoxidil 5%, tretinoin 0.01% — topical foam
  • Dutasteride 0.1%, minoxidil 5%, tretinoin 0.01% in Trichosol — topical solution
  • Dutasteride 0.2%, minoxidil 5%, tretinoin 0.01% — topical liquid
  • Dutasteride 0.2%, minoxidil 5%, tretinoin 0.01% — topical foam
  • Dutasteride 0.2%, minoxidil 5%, tretinoin 0.01% in Trichosol — topical solution
Dutasteride only
  • Dutasteride 0.05% — topical liquid
  • Dutasteride 0.05% — topical foam
  • Dutasteride 0.05% in Trichosol — topical solution
  • Dutasteride 0.1% — topical liquid
  • Dutasteride 0.1% — topical foam
  • Dutasteride 0.1% in Trichosol — topical solution
  • Dutasteride 0.2% — topical liquid
  • Dutasteride 0.2% — topical foam
  • Dutasteride 0.2% in Trichosol — topical solution
Finasteride only
  • Finasteride 0.05% — topical liquid
  • Finasteride 0.05% — topical foam
  • Finasteride 0.05% in Trichosol — topical solution
  • Finasteride 0.1% — topical liquid
  • Finasteride 0.1% — topical foam
  • Finasteride 0.1% in Trichosol — topical solution
  • Finasteride 0.2% — topical liquid
  • Finasteride 0.2% — topical foam
  • Finasteride 0.2% in Trichosol — topical solution
Minoxidil only
  • Minoxidil 5% — topical liquid
  • Minoxidil 5% — topical foam
  • Minoxidil 5% in Trichosol — topical solution
Minoxidil + Tretinoin
  • Minoxidil 5%, tretinoin 0.01% — topical liquid
  • Minoxidil 5%, tretinoin 0.01% — topical foam
  • Minoxidil 5%, tretinoin 0.01% in Trichosol — topical solution
Finasteride + Minoxidil + Tretinoin
  • Finasteride 0.05%, minoxidil 5%, tretinoin 0.01% — topical liquid
  • Finasteride 0.05%, minoxidil 5%, tretinoin 0.01% — topical foam
  • Finasteride 0.05%, minoxidil 5%, tretinoin 0.01% in Trichosol — topical solution
  • Finasteride 0.1%, minoxidil 5%, tretinoin 0.01% — topical liquid
  • Finasteride 0.1%, minoxidil 5%, tretinoin 0.01% — topical foam
  • Finasteride 0.1%, minoxidil 5%, tretinoin 0.01% in Trichosol — topical solution
  • Finasteride 0.2%, minoxidil 5%, tretinoin 0.01% — topical liquid
  • Finasteride 0.2%, minoxidil 5%, tretinoin 0.01% — topical foam
  • Finasteride 0.2%, minoxidil 5%, tretinoin 0.01% in Trichosol — topical solution
Dutasteride + Minoxidil
  • Dutasteride 0.05%, minoxidil 5% — topical liquid
  • Dutasteride 0.05%, minoxidil 5% — topical foam
  • Dutasteride 0.05%, minoxidil 5% in Trichosol — topical solution
  • Dutasteride 0.1%, minoxidil 5% — topical liquid
  • Dutasteride 0.1%, minoxidil 5% — topical foam
  • Dutasteride 0.1%, minoxidil 5% in Trichosol — topical solution
  • Dutasteride 0.2%, minoxidil 5% — topical liquid
  • Dutasteride 0.2%, minoxidil 5% — topical foam
  • Dutasteride 0.2%, minoxidil 5% in Trichosol — topical solution
Finasteride + Minoxidil
  • Finasteride 0.05%, minoxidil 5% — topical liquid
  • Finasteride 0.05%, minoxidil 5% — topical foam
  • Finasteride 0.05%, minoxidil 5% in Trichosol — topical solution
  • Finasteride 0.1%, minoxidil 5% — topical liquid
  • Finasteride 0.1%, minoxidil 5% — topical foam
  • Finasteride 0.1%, minoxidil 5% in Trichosol — topical solution
  • Finasteride 0.2%, minoxidil 5% — topical liquid
  • Finasteride 0.2%, minoxidil 5% — topical foam
  • Finasteride 0.2%, minoxidil 5% in Trichosol — topical solution

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In simple terms

Gro makes personalised hair loss treatment accessible and liveable.

You get a 30ml bottle for one month, £29.99 pricing, up to three active ingredients at a concentration chosen for you, and a choice of liquid, foam, or Trichosol alcohol-free and propylene glycol-free solution. If you want a treatment that fits your scalp, your sensitivities, and your treatment history — not a generic protocol — the Gro range gives you more than one route without making the choice unnecessarily complicated.

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Buy Finasteride 0.1% in Trichosol (prescription only)

This is a Prescription Only Medicine. You can request it from courierpharmacy.co.uk by completing a quick online consultation, reviewed by a UK-qualified prescriber for suitability and safety. If appropriate, Courier Pharmacy will dispense the compounded Trichosol solution and deliver it discreetly.

  1. Complete the online consultation
  2. Prescriber reviews your answers for suitability and safety
  3. Prescription issued if clinically appropriate
  4. Dispensed and delivered discreetly to your door

If the treatment is not suitable, this will be explained clearly and the next best option may be suggested.

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Summary

  • Prescription-only compounded single-ingredient treatment for pattern hair loss
  • Targets DHT — the key hormonal driver of androgenetic alopecia
  • Propylene glycol free, alcohol free Trichosol base for better scalp tolerability
  • Finasteride at 0.1% — a clinically considered mid-range concentration
  • May help patients who need a single-ingredient approach or who have not tolerated standard topical bases
  • Good outcomes depend on consistency, review, and realistic expectations
  • Comes in a convenient 30ml bottle designed to last around one month, at less than £1 per day

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Finasteride 0.1% in Trichosol — Active ingredient

Finasteride 0.1%

Finasteride is a 5-alpha reductase inhibitor. It reduces the conversion of testosterone to dihydrotestosterone, or DHT — the key hormonal driver of androgenetic alopecia in susceptible hair follicles. Unlike dutasteride, finasteride selectively blocks type 2 5-alpha reductase. At 0.1%, this is a clinically considered mid-range concentration. It reflects a clinical decision that this is the most appropriate strength for the individual — not a default, but a considered choice based on their profile, history, and treatment goals.

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Why the Trichosol vehicle matters

The Trichosol base is also clinically relevant. It removes the excipients most likely to cause scalp irritation — making it possible for patients to apply their treatment comfortably and consistently, which is one of the most important factors in whether any hair loss treatment succeeds over time.

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What is the Finasteride 0.1% in Trichosol solution used for?

Pattern hair loss in men and women

This product treats pattern hair loss, also called androgenetic alopecia. In men, this often appears as a receding hairline or thinning at the crown. In women, it may present as diffuse thinning or a widening parting. The aim is to support hair retention and encourage healthier growth where clinically appropriate.

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The problems of hair loss

The practical problem is visible thinning. The internal problem is the loss of confidence that builds quietly alongside it. The deeper issue is that people should not have to feel dismissed or left to navigate treatment alone for something that so clearly affects daily life.

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Who this formula is for

Some patients come to this formula because their clinical profile indicates that finasteride at 0.1% is the right concentration — and they need it in a gentler base because standard products have caused irritation. Others arrive because their TrichoTest results suggest a moderate anti-androgen response, and finasteride — rather than dutasteride — is the most appropriate active ingredient for their genetic profile. Others still come because a single-ingredient approach at a carefully selected strength is the most appropriate starting point for their profile. In all cases, a compounded single-ingredient Trichosol solution at 0.1% finasteride offers a more considered, personalised path than anything available off the shelf.

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How does the Finasteride 0.1% in Trichosol solution work?

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Finasteride: blocking the hormonal signal

In pattern hair loss, follicles gradually shrink under the influence of DHT. Hairs become finer, shorter, and less visible over time. Left unaddressed, follicles eventually stop producing visible hair altogether. Finasteride works by blocking type 2 5-alpha reductase — reducing the conversion of testosterone into DHT at the follicle. It is a well-established anti-androgen approach with a long track record in pattern hair loss treatment. For patients whose TrichoTest results or clinical profile indicate that finasteride is the most appropriate anti-androgen — rather than dutasteride — this formula delivers it at a concentration matched to their individual requirement. At 0.1%, the concentration reflects a clinical judgment that this is the right strength for the individual — a mid-range concentration that is neither the most cautious available nor the most aggressive. It is the concentration that clinical assessment and, where used, TrichoTest results have indicated is the best match for this patient's profile. Think of finasteride as turning down the hormonal signal — reducing the DHT-driven pressure that causes follicles to miniaturise over time. Courierpharmacy.co.uk divider

How do you use the Finasteride 0.1% in Trichosol?

This formulation is a topical solution and should only be used exactly as prescribed. The usual direction is:

Apply 1ml at night to the scalp using the dropper bottle and wash off in the morning.

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A dose you can place precisely

The dropper bottle gives you direct control over where the solution goes. You direct it to the areas of thinning, not across the entire scalp. No spray drift. No product landing where it is not needed. In a Trichosol base, the solution sits comfortably without the sting of alcohol or the heaviness of propylene glycol.

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The right concentration for you

Because this is a compounded medicine, the prescriber selects the finasteride concentration based on your individual clinical profile. At 0.1%, this formula uses a mid-range compounded finasteride strength. It may be the right starting point for patients whose profile indicates a moderate anti-androgen requirement, or the right ongoing concentration for those whose TrichoTest results and treatment history support this strength.

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Building a routine that works

Many people find it easiest to apply as part of their evening routine — after a shower, before bed. The Trichosol base makes the application experience far more comfortable than a standard alcohol or propylene glycol-based product. Applied consistently at the same time each night and washed off in the morning, treatment has the best possible conditions to work.

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What to do if you miss a dose

Resume at the next usual time. Do not apply extra to make up for it. Consistent daily use over months matters far more than compensating for a missed night.

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Finasteride 0.1% in Trichosol — Warnings and precautions

Who should not use this product

This product is not suitable for everyone. Extra care is needed if you are pregnant, trying to become pregnant, breastfeeding, have a scalp condition affecting absorption, or have a history of allergy to any ingredient in the formulation.

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Finasteride warnings

Finasteride affects hormone pathways. Women who are pregnant or may become pregnant must not use this product — it can affect male foetal development. Men with a history of prostate cancer, BPH, or elevated PSA levels need careful assessment before starting. Finasteride lowers PSA levels, which may mask early prostate cancer. Baseline PSA screening may be required. Men with a family history of prostate cancer should discuss this with the prescriber.

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A note on concurrent treatments

This formula contains finasteride only. If you are using minoxidil or other topical hair loss agents alongside this solution, disclose this during consultation. Concurrent use of multiple topical hair loss agents is not usually recommended without prescriber guidance. If minoxidil is part of your broader treatment plan, cardiovascular risk and relevant drug interactions will also need to be assessed.

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Post-finasteride syndrome

Post-finasteride syndrome (PFS) is a rare but recognised concern linked to finasteride use. It refers to persistent sexual dysfunction, mood changes, or other symptoms that may continue after stopping the medication. Topical finasteride at 0.1% carries lower systemic exposure than oral forms, but the prescriber will discuss this risk during consultation. Any previous adverse effects from finasteride or related compounds must be disclosed.

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Compounded does not mean casual

The Trichosol base and mid-range finasteride concentration do not reduce the need for proper prescribing review. The same thorough safety and suitability checks apply here as with any other prescription treatment. A full medical history — including cardiovascular status, prostate health, previous medication reactions, and mood or sexual function concerns — will be reviewed during consultation.

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Finasteride 0.1% in Trichosol — Side effects

Common side effects

Common side effects may include scalp irritation, dryness, redness, itching, flaking, or temporary shedding early in treatment. The Trichosol base reduces the likelihood of alcohol and propylene glycol-related dryness and stinging, but it does not eliminate the possibility of local reactions entirely. Early shedding can be unsettling, but it occurs as follicles shift through the hair cycle in response to treatment and usually settles with time.

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Finasteride-related effects

Finasteride at 0.1% topical strength may cause sexual dysfunction in some patients — including reduced libido, erectile dysfunction, or ejaculation disorders. These effects are uncommon with topical application but have been reported. Mood changes, depression, or anxiety have also been documented with finasteride use, and post-finasteride syndrome remains a recognised concern. The prescriber will discuss this during consultation.

Report mood changes, persistent sexual dysfunction, or any other concerning symptoms promptly.

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When to seek advice

Seek advice if you develop marked irritation, swelling, chest symptoms, dizziness, palpitations, signs of allergy, severe mood changes, or persistent sexual dysfunction.

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Finasteride 0.1% in Trichosol — Drug interactions

Why interactions still matter with topical treatment

Even as a single-ingredient formula, finasteride carries interaction considerations. Thorough review before starting remains important.

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Finasteride interactions

Finasteride is metabolised via the CYP3A4 pathway. Strong CYP3A4 inhibitors may increase finasteride levels; enzyme inducers may reduce them. Topical absorption is lower than oral finasteride, but relevant medicines will be reviewed during consultation.

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Other scalp products

Other scalp treatments, harsh exfoliants, or irritating cosmetic products may increase the risk of local reactions. Concurrent use of multiple topical hair loss agents is not usually recommended without prescriber guidance. All current products should be disclosed during consultation.

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Previous finasteride reactions

If you have a history of post-finasteride syndrome or adverse effects from finasteride, disclose this before starting. This information is essential for the prescriber to assess suitability safely.

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Finasteride 0.1% in Trichosol — FAQs

How long does it take to see results?

Hair loss treatment needs patience. Most people need several months of regular use before they can judge whether a treatment is helping. The Trichosol base makes consistent nightly application more comfortable — and comfort supports the consistency that treatment outcomes depend on.

Is this suitable for both men and women?

It may suit some adults, but the prescriber will assess this carefully. Hormonal considerations and pregnancy risk are especially important. Women who are pregnant or may become pregnant must not use this product.

Why is this a single-ingredient formula?

Not every patient needs a multi-ingredient formula from the outset. For some, finasteride alone at a carefully selected concentration is the most clinically appropriate starting point — whether because of their treatment history, their TrichoTest profile, or a clinical decision to assess response to a single ingredient before expanding the formula. A single-ingredient Trichosol solution is not a lesser option. It is a considered one.

Why is the finasteride concentration 0.1%?

0.1% is a mid-range compounded finasteride concentration. The prescriber selects it when clinical assessment indicates this is the most appropriate starting or ongoing strength — whether because the patient's profile suggests a moderate anti-androgen requirement, a TrichoTest result supports this concentration, or previous treatment history points to this as the right strength. It is not a default. It is the right option for the right patient.

Why is this formula in Trichosol?

Trichosol removes propylene glycol and alcohol from the base entirely. For patients who have experienced irritation, stinging, or dryness with standard topical solutions, it can make daily treatment significantly more comfortable — and comfort is what drives the consistency that good outcomes depend on.

How is finasteride different from dutasteride?

Both are 5-alpha reductase inhibitors that reduce DHT. Finasteride selectively blocks type 2 5-alpha reductase. Dutasteride blocks both type 1 and type 2. TrichoTest can help identify which is the more appropriate active ingredient for your individual genetic profile. The prescriber will discuss the most suitable option for your specific clinical situation.

What is compounding and why does it matter?

Compounding is the preparation of a medicine to order for an individual patient by a licensed pharmacy. It allows the ingredients, concentrations, and base to be tailored specifically to the person being treated. The 0.1% finasteride concentration in this formula does not exist in any standard licensed product — compounding is what makes it possible.

Can I add more ingredients to this formula later?

Yes. One of the advantages of compounded treatment is that the formula can evolve over time. If clinical assessment or TrichoTest results indicate that minoxidil, tretinoin, or other ingredients would be beneficial, the prescriber can adjust the formula accordingly. Discuss this during your consultation or at review.

Can I use it if standard hair loss products have irritated my scalp?

Quite possibly. The absence of propylene glycol and alcohol removes two of the most common causes of scalp irritation in standard topical solutions. Suitability still needs to be assessed by a prescriber, but for patients with reactive scalps this formulation is often a more comfortable and sustainable option.

How can TrichoTest help with this treatment?

TrichoTest analyses 26 genetic markers linked to hair loss susceptibility and treatment response across nine key pathways. It helps the prescriber decide whether this single-ingredient Trichosol formula is right for you — and whether 0.1% finasteride is the appropriate active ingredient and concentration — based on your unique genetics rather than a standard protocol. It can also identify whether additional ingredients are likely to be beneficial, and which nutritional gaps or metabolic factors may be affecting your hair health.

Does TrichoTest guarantee the right treatment?

No. It reduces guesswork and supports more informed prescribing, but it does not guarantee results. Genetic testing works best alongside clinical assessment and your personal treatment history.

Will I need a prescription?

Yes. This is a Prescription Only Medicine. A UK-qualified prescriber must review suitability before supply. The consultation can be completed online at courierpharmacy.co.uk.

Can I stop if I see improvement?

Do not stop or change treatment without advice. Hair loss often returns to its previous pattern if treatment stops, even when results have been encouraging.

What is the Gro hair loss range?

Gro is the compounded hair loss brand from Courier Pharmacy and Medical Mojo. It offers liquid, foam, and Trichosol formulations, all priced at £29.99 for up to three active ingredients — less than £1 per day.

How much does this cost?

£29.99 for a 30ml bottle, designed to last around one month. Less than £1 per day.

How long does a 30ml bottle last?

Around one month when applied as directed — 1ml applied to the scalp at night using the dropper bottle.

What is the difference between liquid, foam, and Trichosol?

Liquid is a traditional spray solution containing alcohol and propylene glycol. Foam is lighter, faster-drying, and easier to apply without dripping. Trichosol is a propylene glycol free and alcohol free option for patients with sensitive or reactive scalps. All are available across the Gro range.

Is Trichosol better than liquid or foam?

It depends on your scalp and your previous experience with topical treatments. Trichosol is often the most appropriate choice for patients who have reacted to standard bases or who want a more comfortable daily experience. The prescriber can help you decide.

Can I use other hair loss products at the same time?

Concurrent use of multiple topical hair loss agents is not usually recommended without prescriber guidance. Disclose all current treatments during consultation.

What if I have had problems with finasteride before?

Disclose this during consultation. Any previous adverse effects from finasteride — including post-finasteride syndrome — are essential information for the prescriber to assess your suitability for this treatment safely.

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Disclaimer

This article is for informational purposes only and does not constitute medical advice. Always consult a qualified healthcare professional before starting any new treatment.

References

[1] NHS. Hair loss. Available at: https://www.nhs.uk/conditions/hair-loss/

[2] NICE CKS. Alopecia — androgenetic. Available at: https://cks.nice.org.uk/topics/alopecia-androgenetic/

[3] Suchonwanit, P., Thammarucha, S. and Leerunyakul, K. (2019) Minoxidil and its use in hair disorders: a review. Available at: https://pmc.ncbi.nlm.nih.gov/articles/PMC6691938/

[4] Courier Pharmacy (n.d.) Dutasteride and minoxidil: a powerful combination for hair loss in the UK. Available at: https://courierpharmacy.co.uk/dutasteride-and-minoxidil-a-powerful-combination-for-hair-loss-in-the-uk/

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Byline

Written by the Courier Pharmacy clinical content team and reviewed in line with UK pharmacy standards.

How this content was created

This content was created using UK clinical guidance, peer-reviewed evidence, and patient-focused healthcare writing principles. It supports safe understanding, not self-prescribing, and has been reviewed in line with pharmacy standards.

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Finasteride 0.1% in Trichosol topical hair loss solution
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