Topical finasteride is not available as an FDA-approved product you can pick up at a pharmacy with a standard prescription. Instead, it’s dispensed as a compounded medication, meaning a pharmacy mixes it to order based on a doctor’s prescription. You can get it through a dermatologist, a hair loss specialist, or one of several telehealth platforms that have made the process significantly easier in recent years.
Telehealth Platforms: The Most Common Route
Most people getting topical finasteride today do so through direct-to-consumer telehealth companies. Platforms like Hims & Hers, Ro, and Curology all offer compounded topical finasteride for hair loss. The process is similar across all of them: you fill out a medical questionnaire, upload photos of your scalp, and a licensed provider reviews your case. If approved, the prescription is filled by a partnered compounding pharmacy and shipped to your door, typically within a week or two.
These consultations are usually asynchronous, meaning you won’t have a live video call unless the provider needs more information. Costs vary by platform but generally run between $30 and $90 per month, which includes both the consultation and the medication. Some platforms bundle topical finasteride with minoxidil in a single solution, which can simplify your routine but also means you’re locked into their specific formulation.
Going Through a Dermatologist
If you prefer a more traditional route, any dermatologist or hair loss specialist can write a prescription for compounded topical finasteride. This gives you more control over the formulation, concentration, and which compounding pharmacy fills your order. The tradeoff is cost and logistics. You’ll pay for the office visit separately, and you’ll need to find a compounding pharmacy that works with your provider. Not every local pharmacy compounds medications, so you may end up using a mail-order compounding pharmacy anyway.
One advantage of seeing a specialist in person is a more thorough evaluation. A dermatologist can examine your scalp under magnification, rule out other causes of hair loss, and tailor the concentration and formula to your specific pattern. This matters because topical finasteride comes in a range of strengths, and the right one for you depends on how much hair loss you have and how your body responds.
Concentrations and What They Mean
Compounded topical finasteride typically ranges from 0.005% to 0.25%, with 0.1% and 0.25% being the most commonly prescribed. Higher concentrations block more of the hormone (DHT) that drives male pattern hair loss, but they also increase systemic absorption. In a clinical trial comparing 0.25% topical finasteride applied twice daily to 1 mg oral finasteride, the topical version reduced blood DHT levels by 68 to 75%, which was actually comparable to the 62 to 72% reduction seen with the oral pill.
The volume you apply also matters. When researchers tested different amounts of 0.25% topical finasteride on the scalp, smaller volumes (around 100 to 200 microliters) reduced blood DHT by only 24 to 26%, while larger volumes (300 to 400 microliters) pushed suppression up to 44 to 48%. This is worth knowing because it means how much you apply, not just the concentration, determines how much of the drug reaches your bloodstream. If minimizing systemic effects is your goal, using a lower concentration or a smaller amount per application is the lever you can pull.
How to Apply It
Most formulations are applied as a liquid or spray directly to the thinning areas of the scalp. A typical dose is about 1 mL per application if your hair loss is concentrated in one area (like the crown or temples), or 2 mL if it’s more spread out. You apply it to dry or towel-dried hair, let it absorb, and leave it on.
Frequency depends on your formulation and how long you can leave it on your scalp. If you can keep it on for 10 to 12 hours (applying before bed, for example), once daily is generally sufficient. If you can only leave it on for 4 to 6 hours at a time, twice daily may work better, or your provider might prescribe a higher concentration to compensate. After about 30 days of daily use, once the drug has fully saturated your scalp tissue, some evidence suggests you can reduce frequency to five times per week and still maintain results. Clinical studies have shown that even very low concentrations (0.005%) applied twice daily can improve hair growth over 16-month periods.
Why People Choose Topical Over Oral
The main appeal of topical finasteride is the potential for lower systemic exposure. Oral finasteride works well for hair loss, but it circulates through your entire body and suppresses DHT systemically. This is what causes the sexual side effects (reduced libido, erectile changes) that concern many men considering the drug. Topical finasteride delivers the active ingredient directly to the scalp, where it can block DHT locally in the hair follicle.
The catch is that topical finasteride still enters the bloodstream to some degree. How much depends on the concentration, the volume applied, and how long it sits on your scalp. At higher doses and volumes, the systemic DHT suppression can approach what you’d see with the oral pill. At lower doses, the gap is more meaningful. This is why the concentration conversation with your provider matters. It’s not a binary choice between “no systemic effects” and “same as the pill,” but a spectrum you can adjust.
What to Expect After Starting
Like oral finasteride, the topical version takes time to show visible results. Most people need at least three to four months of consistent use before noticing reduced shedding, and six to twelve months before seeing meaningful regrowth. Some people experience a temporary increase in shedding during the first few weeks as weaker hairs are pushed out by new growth. This is normal and not a sign the treatment is failing.
Scalp irritation is the most common local side effect, particularly with alcohol-based formulations. If you notice redness, itching, or flaking, your compounding pharmacy may be able to reformulate using a different base. Some platforms offer formulations with minoxidil, biotin, or other ingredients mixed in, which can reduce the number of products you need to apply but also makes it harder to identify what’s causing any irritation if it occurs.
Because topical finasteride is compounded rather than commercially manufactured, quality and consistency can vary between pharmacies. Sticking with an established telehealth platform or a well-regarded compounding pharmacy helps ensure you’re getting a reliable product at the stated concentration.