Home » Treatment » Dutasteride 0.05%, Minoxidil 5%, Tretinoin 0.01% topical hair loss liquid
Dutasteride 0.05%, Minoxidil 5%, Tretinoin 0.01% topical hair loss liquid
from£29.99
A personalised topical hair loss liquid containing dutasteride 0.05%, minoxidil 5%, and tretinoin 0.01% in a traditional alcohol and propylene glycol base. Designed for adults who want a clinically considered introduction to compounded dutasteride treatment — or a long-term formula at the lowest available concentration. Applied as six sprays (1ml) to the scalp at night and washed off in the morning.
Hair loss is easy to dismiss — until it happens to you. The visible signs are familiar: thinning at the crown, a wider parting, a hairline moving in the wrong direction. The less visible impact is often harder to carry. Confidence drops. Self-consciousness builds. The worry that things are getting worse — and that nothing tried so far has made a real difference — becomes part of daily life.
The problem with doing nothing
Pattern hair loss does not pause while you decide what to do. Follicles continue to miniaturise under the influence of DHT. Many people spend months trying standard off-the-shelf products that are not matched to their biology, then conclude that treatment does not work. Often the issue is not treatment itself. It is the wrong treatment, at the wrong strength, for the wrong person.
Why a careful start matters
The dutasteride 0.05%, minoxidil 5%, tretinoin 0.01% topical liquid is designed for patients who want to begin compounded dutasteride treatment at the lowest available concentration. For some, this is a cautious clinical starting point. For others, it reflects a TrichoTest result suggesting a lower dutasteride requirement. For others still, it is the right ongoing concentration based on individual response and prescriber assessment.
Starting at the lowest available dose is not starting weak. It is starting right for you.
Why a traditional liquid base?
The liquid format uses alcohol and propylene glycol — a well-established combination in topical hair loss treatment. These excipients are effective penetration enhancers. They help carry active ingredients through the scalp barrier efficiently, and they have decades of clinical use behind them in this context.
A dose you can measure
The spray applicator delivers exactly 1ml across six sprays. No estimating. No guesswork. Each spray goes precisely where you direct it — to the areas of thinning, not across the entire scalp. That consistency of dosing and delivery matters when you are applying treatment night after night for months.
Three ingredients. One goal.
Three active ingredients work together across different parts of the hair loss pathway:
Dutasteride 0.05% reduces DHT’s effect on hair follicles at the lowest available compounded concentration
Minoxidil 5% supports the active growth phase of the hair cycle
Tretinoin 0.01% may help minoxidil work more effectively, especially for those who have not responded well to minoxidil alone
A medically responsible route
At Courier Pharmacy, treatment starts with a proper assessment. Suitability is checked. The decision to prescribe this compounded liquid is a clinical one — based on your scalp, your history, and your goals.
Prescription-only compounded topical liquid for pattern hair loss
Traditional spray format with precise, measured delivery
0.05% dutasteride — the lowest available concentration, chosen for the individual
Reviewed for suitability by a UK-qualified prescriber
Additional information
Quantity
1 x 30, 2 x 30, 3 x 30, 4 x 30, 5 x 30, 6 x 30
MOJO WISDOM
Take control of your health by understanding your condition and what this medication is doing for you.
READ:
More information about this treatment.
UK-based doctors and pharmacists
Discreet and Confidential
UK-based doctors and pharmacists
Free, Expert Advice
No video link provided.
No video link provided.
UK-based doctors and pharmacists
Free, expert advice
Discrete and confidential
Fast delivery
Giving you trusted clinical advice for over 40 conditions
A UK regulated pharmacy providing safe, effective treatments online since 2014
What is the Dutasteride 0.05%, Minoxidil 5%, Tretinoin 0.01% topical hair loss liquid?
This compounded topical hair loss liquid combines dutasteride 0.05%, minoxidil 5%, and tretinoin 0.01% in a traditional alcohol and propylene glycol base. It is designed for adults with pattern hair loss who want a more personalised, prescription-only approach — particularly those who are new to dutasteride or stepping into compounded treatment for the first time. The aim is straightforward: target the biology behind thinning hair with three active ingredients, at the lowest available dutasteride concentration, delivered efficiently via a spray applicator.
Combines three active ingredients that target hair loss from different angles
Traditional spray liquid format for precise, measured delivery
Dutasteride at 0.05% — the lowest available concentration, suitable for those starting compounded dutasteride treatment
May suit people with androgenetic alopecia who want a clinically considered introduction to compounded treatment
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
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, a hairline moving in the wrong direction. The less visible impact is often harder to carry. Confidence drops. Self-consciousness builds. The worry that things are getting worse — and that nothing tried so far has made a real difference — becomes part of daily life.
The problem with doing nothing
Pattern hair loss does not pause while you decide what to do. Follicles continue to miniaturise under the influence of DHT. Many people spend months trying standard off-the-shelf products that are not matched to their biology, then conclude that treatment does not work. Often the issue is not treatment itself. It is the wrong treatment, at the wrong strength, for the wrong person.
Why a careful start matters
The dutasteride 0.05%, minoxidil 5%, tretinoin 0.01% topical liquid is designed for patients who want to begin compounded dutasteride treatment at the lowest available concentration. For some, this is a cautious clinical starting point. For others, it reflects a TrichoTest result suggesting a lower dutasteride requirement. For others still, it is the right ongoing concentration based on individual response and prescriber assessment.
Starting at the lowest available dose is not starting weak. It is starting right for you.
Why a traditional liquid base?
The liquid format uses alcohol and propylene glycol — a well-established combination in topical hair loss treatment. These excipients are effective penetration enhancers. They help carry active ingredients through the scalp barrier efficiently, and they have decades of clinical use behind them in this context.
A dose you can measure
The spray applicator delivers exactly 1ml across six sprays. No estimating. No guesswork. Each spray goes precisely where you direct it — to the areas of thinning, not across the entire scalp. That consistency of dosing and delivery matters when you are applying treatment night after night for months.
Three ingredients. One goal.
Three active ingredients work together across different parts of the hair loss pathway:
Dutasteride 0.05% reduces DHT’s effect on hair follicles at the lowest available compounded concentration
Minoxidil 5% supports the active growth phase of the hair cycle
Tretinoin 0.01% may help minoxidil work more effectively, especially for those who have not responded well to minoxidil alone
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 moving backwards. 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 want a careful, direct approach
This liquid is aimed at people who want a clinically considered, three-ingredient treatment at the lowest available dutasteride concentration — delivered in a traditional format that absorbs efficiently and has a long track record in topical hair loss treatment. It is a starting point, not a compromise.
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 format that delivers active ingredients efficiently, night after night.
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 a compounded liquid because standard products do not offer the right combination of ingredients. Others choose it because the concentration they need — such as 0.05% dutasteride — does not exist in any licensed product. Others come to compounding after trying standard options without adequate results, and want a more considered clinical approach.
The 0.05% dutasteride concentration in this formula cannot be obtained from any standard licensed product. It is only possible through compounding — and it is prescribed at this strength because clinical assessment indicates this is the most appropriate starting or ongoing dose for the individual being treated.
Personalised medicine in practice
Hair loss is not identical from one person to the next. The right dutasteride concentration for one patient is not the right concentration for another. Compounding makes it possible to prescribe at 0.05% — when clinical assessment and patient profile indicate this is the right place to start. The medicine is shaped around the patient, not the other way around.
The traditional liquid advantage
An established vehicle with a proven track record
The liquid format is the original vehicle for topical hair loss treatment. Alcohol and propylene glycol are effective penetration enhancers. They help carry active ingredients through the scalp barrier efficiently and have decades of clinical use behind them in this context.
Precise dosing with every application
The spray applicator removes the guesswork. Six sprays deliver exactly 1ml — the standard prescribed dose. You direct each spray precisely to areas of thinning. The liquid does not pool or drip the way a free-pour application might. That precision makes consistent, accurate use straightforward.
What to know about the base
The alcohol and propylene glycol base works well for many patients. It absorbs efficiently and has a well-understood safety profile in topical scalp use. However, some patients find this base causes dryness, stinging, or scalp irritation — particularly those with more sensitive scalps. If this applies to you, discuss it with the prescriber. Alternative formats — including the foam and the Trichosol alcohol-free and propylene glycol-free option — are available within the Gro range.
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 the 0.05% dutasteride concentration
The 0.05% dutasteride concentration is one area where TrichoTest is particularly valuable. Some patients have genetic profiles that suggest a lower anti-androgen requirement — meaning 0.05% may be as effective for them as a higher concentration would be for someone else. TrichoTest can identify this before treatment begins, helping the prescriber choose the right starting strength from the outset rather than adjusting after months of treatment.
How the TrichoTest informs this formula
If TrichoTest identifies a moderate or lower response to anti-androgens, the prescriber may determine that 0.05% dutasteride alongside full-strength minoxidil and tretinoin is the most clinically appropriate combination.
If the test reveals poor minoxidil response — due to low SULT1A1 activity — the prescriber may adjust the formula. They might add alternative vasodilators or place greater emphasis on tretinoin to maximise whatever minoxidil activation is possible, while keeping dutasteride at the concentration most appropriate for the individual.
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 liquid 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 dutasteride concentration, in this specific base — 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. Six sprays deliver a precise 1ml dose. This is the formulation described on this page. Chosen by patients who want a direct, proven format.
Hair loss foam — lighter, faster-drying, and easier to apply without dripping. Chosen by patients who want clinical results without the mess or residue of a liquid.
Trichosol topical solution — propylene glycol free and alcohol free. Designed for patients with sensitive or reactive scalps who need a gentler base but want the same active ingredients.
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 practical.
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 tailored treatment that fits your biology, your treatment stage, and your daily life — not a generic protocol — the Gro range gives you more than one route without making the choice 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 liquid 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 treatment for pattern hair loss
Combines anti-androgen, growth-supporting, and minoxidil-enhancing ingredients
Traditional spray liquid format with precise, measured dosing
Dutasteride at 0.05% — the lowest available compounded concentration, suitable for a careful clinical starting point
May help patients who are new to dutasteride or who have not responded adequately to standard topical treatments
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
Dutasteride 0.05%, Minoxidil 5%, Tretinoin 0.01% topical hair loss liquid — Active ingredients
Dutasteride 0.05%
Dutasteride 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. At 0.05%, this is the lowest available compounded concentration. It reflects a clinical decision that this is the most appropriate starting strength for the individual — not a compromise, but a considered choice based on their profile, history, and treatment goals.
Minoxidil 5%
Minoxidil is a vasodilator used topically to support the anagen (active growth) phase of the hair cycle.
Tretinoin 0.01%
Tretinoin is a retinoid that may help improve skin cell turnover and enhance the penetration and activation of topical treatments. It is sometimes included in hair loss solutions because it may improve minoxidil's effectiveness — particularly for people who have not seen the response they hoped for with minoxidil alone.
Why the liquid vehicle matters
Together, these three ingredients target different parts of the hair loss pathway. The alcohol and propylene glycol base is also clinically relevant. It acts as an efficient carrier — promoting absorption and helping active ingredients penetrate the scalp effectively. The spray applicator ensures a precise, consistent dose with every application. For patients who tolerate this base well, it offers a direct and efficient route to the follicles that need treatment.
What is the Dutasteride 0.05%, Minoxidil 5%, Tretinoin 0.01% topical hair loss liquid 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 are new to compounded dutasteride treatment and want to start at the lowest available strength. Others arrive because their TrichoTest results suggest a lower anti-androgen concentration is the most clinically appropriate choice. Others still come after trying standard options without satisfactory results, and want a more considered plan. In all cases, a compounded three-ingredient liquid at the lowest available dutasteride concentration offers a more purposeful path than anything available off the shelf.
How does the Dutasteride 0.05%, Minoxidil 5%, Tretinoin 0.01% topical hair loss liquid work?
Hair loss treatment works best when it addresses the problem from multiple angles. This is why many compounded solutions combine dutasteride, minoxidil, and tretinoin — each targeting a different part of the hair loss pathway.
Dutasteride: 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.
Dutasteride blocks two forms of 5-alpha reductase — types 1 and 2 — reducing the conversion of testosterone into DHT. Finasteride only blocks type 2. This makes dutasteride more comprehensive and potentially more effective for people who have not responded well to finasteride.
At 0.05%, the concentration is deliberately cautious. It is the lowest available compounded strength and reflects a clinical judgment that this is the right place to begin — or in some cases, the right ongoing concentration. Starting at the lowest available dose is not a lesser approach. It is a considered one. Think of dutasteride as taking the foot off the brake — reducing the hormonal pressure that shrinks follicles in the background.
Minoxidil: supporting the growth phase
Minoxidil supports the follicle's active growth phase rather than blocking a hormone. It is a pro-drug — inactive in its original form. The body converts it inside the hair follicle using an enzyme called SULT1A1. Once activated, it stimulates blood flow, extends the growth phase, and supports follicle health.
Not everyone activates minoxidil equally well. Some people have high SULT1A1 activity. Others do not. This is why minoxidil works well for some and delivers little for others — the medicine is not weak, but the conversion process varies between individuals.
If dutasteride takes the foot off the brake, minoxidil presses the accelerator — supporting the follicle's natural drive to grow.
Tretinoin: enhancing activation and penetration
Tretinoin is included at 0.01% because it may improve how well both other ingredients work.
It boosts SULT1A1 activity — the enzyme that activates minoxidil. If minoxidil is the fuel, SULT1A1 is the engine. Without enough enzyme activity, the fuel sits unused. Tretinoin turns up the engine.
Beyond that, tretinoin promotes cell turnover, supports growth signals, and creates a more favourable biochemical environment for hair production. It also improves penetration through the scalp surface — helping dutasteride and minoxidil reach the follicles more effectively. The alcohol and propylene glycol base further supports this, acting as efficient penetration enhancers that work alongside tretinoin to carry all three active ingredients through the scalp barrier.
Why combination matters
Single-ingredient treatments address one part of the problem. This formula addresses three simultaneously. Dutasteride reduces the hormonal brake at the lowest available concentration. Minoxidil presses the growth accelerator. Tretinoin enhances minoxidil's activity and supports the follicular environment. The traditional liquid base — applied as six precise sprays — ensures those ingredients reach the scalp efficiently, consistently, and in a controlled dose every time.
This formulation is a topical liquid and should only be used exactly as prescribed. The usual direction is:
Apply 1ml (6 sprays) at night to the scalp and wash off in the morning.
A dose you can control
Six sprays deliver a consistent, measured 1ml dose every time. You direct each spray precisely to the areas of thinning, then massage gently with your fingertips to distribute evenly. No estimating. No concern about whether you applied too much or too little.
The right concentration for you
Because this is a compounded medicine, the prescriber selects the dutasteride concentration based on your individual clinical profile. At 0.05%, this formula uses the lowest available compounded dutasteride strength. It may be the right starting point for patients new to dutasteride, the right cautious approach for those with a sensitive response profile, or the right ongoing concentration for those whose TrichoTest results suggest a lower anti-androgen requirement.
Building a routine that works
Many people find it easiest to apply as part of their evening routine — after a shower, before bed. The liquid works overnight and washes off as part of a normal morning routine. Applied consistently at the same time each night, treatment has the best possible conditions to deliver results.
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.
Dutasteride 0.05%, Minoxidil 5%, Tretinoin 0.01% topical hair loss liquid — 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 — including alcohol or propylene glycol.
Dutasteride warnings
Dutasteride 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. Dutasteride 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.
Minoxidil warnings
Minoxidil is a vasodilator. It may not be appropriate for people with uncontrolled blood pressure, a history of heart attack, stroke, or other cardiovascular events, or those taking multiple blood pressure medications. Topical minoxidil can be absorbed systemically. Cardiovascular risk needs assessment before starting.
People with unexplained hair loss, sudden patchy shedding, or signs of an underlying scalp condition should have these investigated before beginning treatment.
A note on the liquid base
Some patients find alcohol and propylene glycol-based products cause scalp dryness, stinging, or irritation — particularly those with more sensitive skin. If you have previously reacted to products containing these excipients, discuss this with the prescriber before starting. Alternative formats — including the foam and the Trichosol alcohol-free and propylene glycol-free solution — are available within the Gro range and may be more appropriate.
Post-finasteride syndrome
Post-finasteride syndrome (PFS) is a rare but recognised concern linked to 5-alpha reductase inhibitors, including dutasteride. It refers to persistent sexual dysfunction, mood changes, or other symptoms that may continue after stopping the medication. Topical dutasteride at 0.05% 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.
Tretinoin warnings
Tretinoin increases scalp sensitivity and photosensitivity. Use with caution if you have sensitive skin, eczema, or rosacea. Sun protection is important during treatment.
Compounded does not mean casual
The traditional liquid format and lowest available dutasteride 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.
Dutasteride 0.05%, Minoxidil 5%, Tretinoin 0.01% topical hair loss liquid — Side effects
Common side effects
Common side effects may include scalp irritation, dryness, redness, itching, flaking, or temporary shedding early in treatment. The alcohol and propylene glycol base may cause more noticeable dryness or a mild stinging sensation in some patients — particularly in the first few weeks of use. Early shedding can be unsettling, but it occurs as follicles shift through the hair cycle in response to treatment and usually settles with time.
Tretinoin-related effects
Because tretinoin is included, some patients notice increased sensitivity or mild peeling at the start of treatment. This usually reduces as the scalp adjusts.
Minoxidil-related effects
Minoxidil can occasionally cause unwanted hair growth outside the treatment area if the liquid spreads beyond the scalp. The spray applicator helps reduce this risk by delivering a targeted, controlled dose — but care during application still matters.
Systemic absorption of topical minoxidil can occasionally cause dizziness, palpitations, chest discomfort, or blood pressure changes, particularly in people with underlying cardiovascular concerns. This is uncommon with topical use but warrants monitoring.
Dutasteride-related effects
Dutasteride 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 with 5-alpha reductase inhibitors, though causality remains debated.
Report mood changes, persistent sexual dysfunction, or any other concerning symptoms promptly.
If the base causes persistent irritation
If scalp dryness or irritation from the alcohol and propylene glycol base becomes a consistent problem, do not push through. Ask for a review. The foam or Trichosol version of this formula may be a more suitable alternative. One of the genuine advantages of compounded treatment is that the format can be adjusted when tolerability becomes an issue.
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.
Dutasteride 0.05%, Minoxidil 5%, Tretinoin 0.01% topical hair loss liquid — Drug interactions
Why interactions still matter with topical treatment
Dutasteride, minoxidil, and tretinoin each carry interaction considerations. Combining them in one formulation makes a thorough review more important, not less.
Minoxidil interactions
Minoxidil may interact with medicines affecting blood pressure or cardiovascular function — including antihypertensives, beta-blockers, ACE inhibitors, calcium channel blockers, and NSAIDs. It can potentiate blood pressure-lowering effects, increasing the risk of hypotension or dizziness. Any blood pressure medication must be reviewed before starting.
Tretinoin interactions
Tretinoin may interact with topical products that increase irritation or photosensitivity — including vitamin C, benzoyl peroxide, salicylic acid, glycolic acid, and other retinoids. Concurrent use increases the risk of peeling, sensitivity, and irritation. The alcohol base may compound this effect alongside other drying or sensitising scalp products.
Tretinoin also increases sun sensitivity. Photosensitising medicines — certain antibiotics, NSAIDs, or thiazide diuretics — should be discussed with the prescriber.
Dutasteride interactions
Dutasteride may interact with CYP3A4 inhibitors and inducers. Strong CYP3A4 inhibitors such as ketoconazole or ritonavir may increase dutasteride levels. Enzyme inducers may reduce them. Topical absorption is lower than oral dutasteride, but relevant medicines will be reviewed.
Other scalp products
Other scalp treatments, harsh exfoliants, or irritating cosmetic products may increase the risk of local reactions — and may compound the drying effect of the alcohol base. Concurrent use of multiple topical hair loss agents is not usually recommended without prescriber guidance. All current products should be disclosed during consultation.
Previous finasteride reactions
If you have a history of post-finasteride syndrome or adverse effects from finasteride, disclose this before starting. Dutasteride is a related compound. The prescriber will factor this into the clinical assessment.
Hair loss treatment needs patience. Most people need several months of regular use before they can judge whether a treatment is helping. The spray applicator makes consistent nightly dosing straightforward — and consistency is the single most important factor in giving treatment a fair chance.
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.
How does the spray applicator work?
Six sprays deliver exactly 1ml — the standard prescribed dose. Direct each spray to the areas of thinning, then massage gently with your fingertips to distribute evenly. This measured delivery removes guesswork and makes accurate application straightforward night after night.
Why is the dutasteride concentration 0.05%?
0.05% is the lowest available compounded dutasteride concentration. The prescriber selects it when clinical assessment indicates this is the most appropriate starting or ongoing strength — whether because the patient is new to dutasteride, has a lower anti-androgen requirement suggested by TrichoTest, or has a cautious treatment profile. It is not a lesser option. It is the right option for the right patient.
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 format to be tailored specifically to the person being treated. The 0.05% dutasteride concentration in this formula does not exist in any standard licensed product — compounding is what makes it possible.
What if the liquid base causes dryness or irritation?
patients find alcohol and propylene glycol-based products cause scalp dryness or stinging — particularly at the start. If this becomes a persistent problem, ask for a review. The foam or Trichosol version of this formula — without alcohol or propylene glycol — may be a more suitable alternative.
What makes this different from standard minoxidil?
It combines minoxidil with dutasteride at the lowest available compounded concentration and tretinoin in a liquid spray formula. Dutasteride targets the hormonal driver of hair loss. Tretinoin helps activate minoxidil more effectively. The spray applicator delivers a precise, consistent dose. It is a more complete and more considered approach than standard minoxidil alone.
Can I use it if standard hair loss products have irritated my scalp?
If you have previously reacted to alcohol or propylene glycol-based products, discuss this with the prescriber before starting. A foam or Trichosol alternative within the Gro range may be more appropriate for your scalp.
How can TrichoTest help with this treatment?
The TrichoTest analyses 26 genetic markers linked to hair loss susceptibility and treatment response across nine key pathways. It helps the prescriber decide whether this three-ingredient liquid is right for you — and whether 0.05% is the appropriate dutasteride concentration — based on your unique genetics rather than a standard protocol. It can also identify nutritional gaps and metabolic factors that affect your broader treatment response.
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 (six sprays) to the scalp at night.
What is the difference between liquid, foam, and Trichosol?
Liquid is a traditional spray solution containing alcohol and propylene glycol — efficient absorption, precise spray delivery. 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 liquid better than foam or Trichosol?
It depends on your scalp, your sensitivities, and what you find workable in daily use. The liquid base offers efficient absorption and precise spray delivery. The foam and Trichosol options suit patients who find the liquid base uncomfortable. The prescriber can help you decide which format fits your scalp and your routine best.
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. Dutasteride is a related compound and the prescriber needs this information to assess 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.
Download patient leaflet
Dutasteride 0.05%, Minoxidil 5%, Tretinoin 0.01% topical hair loss liquid
