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Finasteride 0.05%, minoxidil 5%, tretinoin 0.01% in Trichosol topical hair loss solution
from£29.99
A personalised topical hair loss solution containing finasteride 0.05%, minoxidil 5%, and tretinoin 0.01% in a Trichosol base free from propylene glycol and alcohol. Designed for adults who need a comprehensive three-ingredient approach targeting the hormonal, circulatory, and absorptive drivers of pattern hair loss — with finasteride at the lowest available compounded concentration, in a base their scalp can genuinely tolerate. Applied using a dropper bottle at night and washed off in the morning.
Finasteride 0.05% + Minoxidil 5% + Tretinoin 0.01% in Trichosol Topical Hair Loss Solution
Compounded finasteride 0.05%, minoxidil 5%, tretinoin 0.01% in Trichosol topical hair loss solution is a gentler treatment option for pattern hair loss
Hair loss is easy to dismiss until it starts affecting you. You may notice thinning at the crown, a wider parting, or a hairline that keeps moving backwards. However, the emotional impact often goes further than appearance alone. Over time, hair loss can lower confidence, increase self-consciousness, and leave you feeling frustrated when previous treatments have not made enough difference.
Why standard treatments can be hard to stick with
For many people, the challenge is not just the hair loss itself. It is also the experience of using treatment every day.
Standard topical hair loss liquids can sting when you apply them. The alcohol can irritate the scalp before the product has time to absorb. At the same time, propylene glycol can leave behind a tight, uncomfortable residue that lingers for hours. After a few weeks, skipping an application can start to feel understandable.
However, consistency matters. If you skip nights regularly, you make it harder for hair loss treatment to work as intended.
Why this three-ingredient combination may be prescribed
Pattern hair loss usually has more than one driver. First, DHT can miniaturise hair follicles through the hormonal pathway. Then, reduced follicle activity and poorer scalp circulation can make thinning more noticeable. In addition, if the scalp does not absorb active ingredients well, even the right treatment may not reach the follicles effectively.
This formula addresses those factors at the same time. Finasteride 0.05% targets the hormonal driver at the most cautious available compounded strength. Minoxidil 5% helps stimulate follicle activity and supports scalp circulation. Meanwhile, tretinoin 0.01% helps improve absorption and supports the environment around the follicle.
Together, these ingredients create a clinically considered three-ingredient approach. Rather than using a default formula, the prescriber selects this treatment because your clinical assessment, and where relevant TrichoTest results, suggest it is the most appropriate option for your needs.
Why choose Trichosol?
This formula uses a Trichosol base, which removes propylene glycol and alcohol entirely. As a result, it offers a gentler daily treatment experience.
That means no stinging on application, no tight scalp afterwards, and no alcohol smell. Instead, you get three active ingredients delivered in a vehicle that many patients find more comfortable to tolerate over time. And because comfort supports consistency, that can make long-term treatment easier to maintain.
Why finasteride 0.05%?
This formula contains finasteride at a concentration of 0.05%, which is the lowest available compounded strength. A prescriber may choose this strength when your profile suggests that a cautious starting approach is the right option.
For example, you may be new to finasteride, your TrichoTest results may suggest a lower anti-androgen requirement, or your prescriber may decide that the most conservative available concentration best suits your individual needs.
So, starting at 0.05% does not mean starting weak. Instead, it means starting with the strength that best matches your clinical profile.
A clinically guided treatment option
At Courier Pharmacy, treatment starts with a proper assessment. We review your suitability carefully before prescribing. As a result, your treatment plan reflects your scalp, your medical history, and your treatment goals.
Key features
Prescription-only compounded Trichosol solution for pattern hair loss
Propylene glycol-free and alcohol-free base for a gentler daily experience
Contains finasteride 0.05%, minoxidil 5%, and tretinoin 0.01% in a clinically considered formula
Designed for patients who want a more comfortable topical option
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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What is Finasteride 0.05%, Minoxidil 5%, Tretinoin 0.01% in Trichosol topical hair loss solution?
This compounded topical hair loss solution contains finasteride 0.05%, minoxidil 5%, and tretinoin 0.01% in a Trichosol base that is completely free from propylene glycol and alcohol. It is designed for adults with pattern hair loss who need a comprehensive three-ingredient approach — targeting the hormonal driver of hair loss at the lowest available finasteride concentration, supporting follicle activity, and enhancing active ingredient delivery — particularly those who need a gentler base because standard topical products have caused irritation, or those whose clinical profile indicates this combination is the most appropriate starting point.
Three active ingredients working together to target DHT, support follicle activity, and enhance absorption
Propylene glycol free, alcohol free Trichosol base for a more comfortable daily experience
Finasteride at 0.05%, minoxidil at 5%, tretinoin at 0.01% — a clinically considered combination
May suit people with androgenetic alopecia who are new to finasteride or 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
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.
A formula for people who need a comprehensive, gentler start
This Trichosol solution is aimed at people who need a carefully considered three-ingredient approach — addressing the hormonal, circulatory, and absorptive drivers of pattern hair loss — in a base their scalp can genuinely tolerate. It is particularly relevant for those new to finasteride treatment who want to start at the lowest available concentration alongside minoxidil and tretinoin, those whose TrichoTest results indicate a lower anti-androgen requirement, and those who have previously reacted to alcohol or propylene glycol-based products.
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 addresses the full picture and a base that makes daily use something you can actually stick to.
The Trichosol advantage
When the vehicle is the problem
For patients who have reacted badly to standard topical hair loss 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 — and it is a standard excipient in most off-the-shelf hair loss products.
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 ingredients are unchanged. Only the vehicle is different — and when starting a comprehensive three-ingredient formula, making sure you can apply it consistently from the outset matters enormously.
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 a three-ingredient hair loss formula requires. Anything that makes consistent application more achievable directly improves the chances of a good outcome.
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.
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.
Why compounding matters for this formula
Some people choose this compounded solution because no standard licensed product combines finasteride at 0.05%, minoxidil, and tretinoin in a Trichosol base — and this specific combination, at these specific concentrations, in a vehicle the scalp can actually tolerate, is what their clinical profile requires. Others come to compounding because standard topical bases have caused irritation and they need three active ingredients delivered in a gentler vehicle. Others want to start cautiously at the lowest finasteride concentration within a comprehensive three-ingredient formula, with the flexibility to adjust over time.
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 any active ingredient.
Personalised medicine in practice
Hair loss is not identical from one person to the next. The right combination of ingredients, concentrations, and vehicle for one patient is not right for another. Compounding makes it possible to prescribe finasteride 0.05%, minoxidil 5%, and tretinoin 0.01% together in a Trichosol base — a 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.
Why this three-ingredient combination can be the right choice
Some patients need all three mechanisms addressed at once — but want the finasteride component to begin at the lowest available concentration. Finasteride at 0.05% blocks the hormonal driver cautiously. Minoxidil stimulates follicle activity and improves scalp blood flow. Tretinoin enhances scalp absorption of the other active ingredients and supports the follicle environment. For patients whose TrichoTest results indicate both a lower anti-androgen requirement and a strong minoxidil response via the SULT1A1 pathway, this combination may be the most clinically considered starting point.
If the formula needs to evolve over time — increasing the finasteride concentration as response and tolerability are established — TrichoTest and clinical assessment will guide that decision. Compounding makes either path possible.
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.
How the TrichoTest informs this formula
This three-ingredient formula draws on multiple TrichoTest pathways simultaneously. The sulphotransferase (SULT1A1) pathway predicts minoxidil response — patients with high SULT1A1 expression are strong responders to minoxidil and may benefit particularly from its inclusion at 5%. The anti-androgen metabolism pathway identifies how effectively a patient responds to finasteride — and whether 0.05% is the most appropriate starting concentration for their genetic profile. Tretinoin at 0.01% supports both by enhancing penetration and follicle health.
TrichoTest can identify all of these factors before treatment begins — allowing the prescriber to arrive at this specific three-ingredient Trichosol formula with clinical confidence, rather than adjusting after months of treatment.
How the TrichoTest informs this formula more broadly
If TrichoTest identifies that a higher finasteride concentration would be more appropriate for the individual’s anti-androgen requirement, the prescriber can adjust accordingly. If results suggest that 0.05% is the right starting point given the individual’s genetic profile, treatment can begin with confidence that this cautious approach is the best available match.
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
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 three-ingredient Trichosol formula is right for you, or whether something different would serve you better.
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.
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
The three formulation types
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.
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.
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.
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.
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 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
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.
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.
Complete the online consultation
Prescriber reviews your answers for suitability and safety
Prescription issued if clinically appropriate
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.
Summary
Prescription-only compounded three-ingredient treatment for pattern hair loss
Targets DHT via finasteride, supports follicle activity via minoxidil, and enhances absorption via tretinoin
Propylene glycol free, alcohol free Trichosol base for better scalp tolerability
Finasteride at 0.05% — the lowest available compounded concentration — minoxidil at 5%, tretinoin at 0.01%
May help patients who are new to finasteride, have a lower anti-androgen requirement, 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
Finasteride 0.05%, Minoxidil 5%, Tretinoin 0.01% in Trichosol — Active ingredients
Finasteride 0.05%
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 0.05%, this is the lowest available compounded concentration. It reflects a clinical decision that the most cautious available approach to anti-androgen treatment is the most appropriate starting point for this individual — not a lesser option, but a considered choice based on their profile, history, and treatment goals.
Minoxidil 5%
Minoxidil is a topical vasodilator and follicle stimulant. It supports hair growth by prolonging the anagen (growth) phase of the hair cycle, improving blood supply to follicles, and stimulating follicle cells to produce thicker, healthier hair. At 5%, this is the standard compounded concentration for adults with pattern hair loss.
Tretinoin 0.01%
Tretinoin is a retinoid that supports hair loss treatment in two ways. At 0.01%, it enhances the scalp's absorption of the other active ingredients — helping finasteride and minoxidil penetrate more effectively to the follicles that need them — and it supports the follicle environment by promoting cell turnover and scalp health. It is used at a low concentration specifically to complement the other active ingredients without causing the irritation associated with higher retinoid strengths.
Why the Trichosol vehicle matters
The Trichosol base is also clinically relevant. Standard hair loss solutions typically rely on alcohol and propylene glycol as delivery vehicles — both of which are common causes of scalp irritation. The Trichosol base removes these entirely, making it possible for patients to apply this three-ingredient formula comfortably and consistently, which is one of the most important factors in whether any hair loss treatment succeeds over time.
What is the Finasteride 0.05%, Minoxidil 5%, Tretinoin 0.01% 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.
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.
Who this formula is for
Some patients come to this formula because they need all three drivers of hair loss addressed simultaneously, but want to start finasteride at the lowest available concentration — in a base their scalp can actually tolerate. Others arrive because their TrichoTest results demonstrate both a lower anti-androgen requirement and strong SULT1A1 activity, making this cautious three-ingredient Trichosol combination the most clinically considered starting point. Others still come because previous standard topical products caused too much irritation — and the Trichosol base removes that barrier while the tretinoin component supports better penetration of the other active ingredients. In all cases, a compounded Trichosol solution at finasteride 0.05%, minoxidil 5%, and tretinoin 0.01% offers a more considered, personalised path than anything available off the shelf.
How does the Finasteride 0.05%, Minoxidil 5%, Tretinoin 0.01% in Trichosol solution work?
Pattern hair loss is driven by multiple overlapping processes. This formula targets three of them directly.
Finasteride: blocking the hormonal signal
In pattern hair loss, follicles gradually shrink under the influence of DHT. Finasteride blocks type 2 5-alpha reductase — reducing the conversion of testosterone into DHT at the follicle. At 0.05%, the concentration reflects a clinical judgment that the most cautious available approach is the right one for this individual. Starting at the lowest available dose is not starting weak. It is starting right for you. Think of finasteride as turning down the hormonal signal — reducing the DHT-driven pressure that causes follicles to miniaturise over time.
Minoxidil: stimulating the follicle
Minoxidil is a potassium channel opener and vasodilator. Applied topically, it improves blood flow to follicles, prolongs the growth phase of the hair cycle, and stimulates follicle cells to produce thicker, healthier hair. It works through an entirely different mechanism from finasteride — addressing the circulatory and follicle-stimulating side of the equation rather than the hormonal side. Think of minoxidil as waking up the follicles — improving the conditions at the scalp so that existing follicles can produce more and healthier hair.
Tretinoin: enhancing delivery and follicle health
Tretinoin at 0.01% works in a supporting role. It promotes cell turnover in the scalp, enhances the penetration of finasteride and minoxidil through the skin barrier, and supports the follicle environment. Think of tretinoin as preparing the ground — helping the other two active ingredients reach the follicles more effectively and supporting the scalp conditions that healthy hair growth depends on.
How do you use the Finasteride 0.05%, Minoxidil 5%, Tretinoin 0.01% in Trichosol?
This formulation is a topical solution and should only be used exactly as prescribed. The usual direction is:
Apply 1ml using the dropper bottle daily
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 — allowing all three active ingredients to work without the daily discomfort that causes people to skip nights.
The right formula for you
Because this is a compounded medicine, the prescriber selects each ingredient and concentration based on your individual clinical profile and, where used, TrichoTest results. The 0.05% finasteride concentration reflects a clinical judgment that the most cautious starting approach to anti-androgen treatment is right for you. The minoxidil and tretinoin concentrations are the standard compounded strengths for this combination. The formula may adjust over time — increasing the finasteride concentration if indicated — as your treatment plan evolves.
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.
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.
Finasteride 0.05%, Minoxidil 5%, Tretinoin 0.01% 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.
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. Post-finasteride syndrome (PFS) — persistent sexual dysfunction, mood changes, or other symptoms after stopping — is a rare but recognised concern, even at the lowest available concentration. The prescriber will discuss this risk during consultation.
Minoxidil warnings
Minoxidil is a vasodilator. Patients with a history of cardiovascular disease, low blood pressure, or cardiac conditions need careful assessment before starting. Systemic absorption is lower with topical use than oral minoxidil, but cardiovascular status will still be reviewed.
Tretinoin warnings
Tretinoin is a retinoid. Women who are pregnant or trying to become pregnant must not use this product — retinoids are associated with serious risks to foetal development. Scalp sensitivity, dryness, or peeling can occur, particularly in the early weeks of use. Avoid applying near the eyes or mucous membranes. Sun sensitivity may be increased — apply at night as directed and use appropriate sun protection during the day.
A note on concurrent treatments
If you are using 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.
Compounded does not mean casual
The Trichosol base and three-ingredient formula 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, pregnancy status, previous medication reactions, and mood or sexual function concerns — will be reviewed during consultation.
Finasteride 0.05%, Minoxidil 5%, Tretinoin 0.01% 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. Tretinoin at 0.01% may cause some initial scalp dryness or sensitivity — this typically settles within the first few weeks. Early shedding is common when starting minoxidil — it occurs as follicles shift through the hair cycle and usually settles within a few months.
Finasteride-related effects
Finasteride at 0.05% 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. 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.
Minoxidil-related effects
Topical minoxidil may cause unwanted facial hair growth if the product spreads beyond the scalp. Apply only to the scalp and avoid contact with the face. Systemic effects are uncommon with topical use but can include dizziness, palpitations, fluid retention, or low blood pressure.
When to seek advice
Seek advice if you develop chest pain, dizziness, palpitations, swelling, marked irritation, signs of allergy, severe mood changes, persistent sexual dysfunction, or unwanted hair growth in areas other than the scalp.
Finasteride 0.05%, Minoxidil 5%, Tretinoin 0.01% in Trichosol — Drug interactions
Why interactions matter with this formula
All three active ingredients carry interaction considerations. Thorough review before starting is essential.
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.
Minoxidil interactions
Topical minoxidil may have an additive effect in patients taking antihypertensive medicines, potentially causing blood pressure to fall further. Patients taking medicines for cardiovascular conditions, blood pressure, or fluid balance should discuss this with the prescriber before starting.
Tretinoin interactions
Tretinoin may increase skin sensitivity and can interact with other topical products that cause dryness or irritation. Products containing salicylic acid, benzoyl peroxide, or strong exfoliants should not be used on the same area without prescriber guidance.
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.
Finasteride 0.05%, Minoxidil 5%, Tretinoin 0.01% in Trichosol — FAQs
How long does it take to see results?
Hair loss treatment needs patience. Most people need several months of consistent use before visible improvement becomes apparent. Early shedding in the first few weeks is common with minoxidil and is not a sign that treatment is failing. 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. Women who are pregnant or trying to become pregnant must not use this product — it contains both finasteride and tretinoin, both of which are contraindicated in pregnancy. Suitability is always assessed individually.
Why does this formula contain three ingredients?
Pattern hair loss has multiple drivers. Finasteride addresses the hormonal pathway. Minoxidil addresses the circulatory and follicle-stimulating pathway. Tretinoin enhances absorption and follicle health. For patients whose TrichoTest results or clinical profile indicate that all three are needed — and that finasteride should begin at the lowest available concentration — this Trichosol combination is the most clinically considered starting point.
Why is the finasteride concentration 0.05%?
0.05% is the lowest available compounded finasteride concentration. The prescriber selects it when clinical assessment — and where used, TrichoTest results — indicates that a cautious starting approach is appropriate, whether because the patient is new to finasteride, has a lower anti-androgen requirement, or because the most conservative available approach is clinically indicated. Starting at 0.05% is not starting weak. It is the right option for the right patient.
Why is this formula in Trichosol?
Standard topical solutions contain alcohol and propylene glycol — both of which can cause stinging, dryness, and scalp irritation. Trichosol removes both entirely. For patients who have experienced these reactions with standard products, it can make a three-ingredient daily treatment significantly more comfortable to sustain — and comfort 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 anti-androgen for the individual's genetic profile. The prescriber will discuss the most suitable option.
What does tretinoin do in this formula?
Tretinoin at 0.01% enhances the scalp's absorption of finasteride and minoxidil, promotes cell turnover, and supports the follicle environment. At this low concentration it complements the other active ingredients without causing the irritation associated with higher retinoid strengths.
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. This specific three-ingredient combination in a Trichosol base does not exist in any standard licensed product — compounding is what makes it possible.
Can the formula be adjusted 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 a higher finasteride concentration, or additional changes, would be beneficial, the prescriber can adjust 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. Suitability still needs to be assessed — particularly because tretinoin may cause some initial scalp sensitivity — but for patients with reactive scalps this Trichosol formulation is often a more comfortable option.
How can TrichoTest help with this treatment?
TrichoTest analyses 26 genetic markers across nine key pathways. It helps the prescriber identify whether finasteride is the most appropriate anti-androgen, whether 0.05% is the right starting concentration, whether minoxidil response is likely to be strong via the SULT1A1 pathway, and whether tretinoin adds meaningful benefit — all before treatment begins.
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 for this formula?
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 — particularly with a three-ingredient formula that needs to be applied consistently long-term. 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.
I have a heart condition — can I use topical minoxidil?
Disclose any cardiovascular history during consultation. The prescriber will assess suitability carefully. Topical minoxidil carries lower systemic absorption than oral forms, but cardiovascular status is always reviewed before prescribing.
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 safely.
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.
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 0.05%, minoxidil 5%, tretinoin 0.01% in Trichosol topical hair loss solution
