Why combine PRP and finasteride at all?
Because they act on different parts of the problem. Male pattern hair loss is driven by DHT, a hormone made from testosterone that gradually shrinks genetically sensitive follicles. Finasteride slows that process, and PRP tries to strengthen the follicles that are still working.
| Finasteride | PRP | |
|---|---|---|
| What it targets | The enzyme that turns testosterone into DHT | Weakened follicles in thinning areas |
| How | A daily 1 mg tablet; the label reports about 65% DHT suppression within 24 hours | Growth factors from your own concentrated platelets, injected into the scalp |
| Time to benefit | Generally three months or more of daily use | Usually measured at three to six months |
| If you stop | Effect reverses within about 12 months | Gains fade without maintenance |
The figures for finasteride come from the Propecia label. The authors of a 2019 review of PRP studies recommend PRP as an add-on and encourage patients to continue topical or oral treatments such as minoxidil and finasteride, precisely because PRP does not suppress the hormonal side of pattern loss.
What do studies of combined treatment show?
Most of the combination research pairs PRP with minoxidil, and those results favor the combination over either treatment alone.
- A 2020 study of 69 men split into PRP, minoxidil and combined groups found PRP beat minoxidil, and the combination beat both minoxidil alone and PRP alone.
- A 2024 meta-analysis of 6 randomized trials with 343 participants found PRP plus minoxidil improved hair density and hair diameter more than either alone, with higher patient satisfaction.
- A 2023 network meta-analysis of 27 trials ranked minoxidil plus PRP above minoxidil alone and PRP alone for density at 24 weeks, although minoxidil plus microneedling ranked highest of all.
For finasteride specifically, these pooled analyses do not answer the question, because they focus on minoxidil. The case for pairing PRP with finasteride rests mainly on their different mechanisms and on the reviewers’ advice, rather than on a large body of head-to-head data. That is worth knowing, and it is also why progress photos matter so much in a combined plan.
How is a combined plan usually staged?
A sensible combined plan sets a clear baseline, adds one change at a time where possible, and judges results on a fixed timeline. A typical sequence looks like this:
- Baseline. Photos in consistent light and, if shedding looks unusual, labs to rule out other causes.
- Medicine first or already in place. Many men are already on finasteride or start it after discussing side effects. The label notes that daily use for three months or more is generally needed before benefit shows.
- First PRP series. About three sessions a month apart, added while the medicine continues.
- Six-month review. Photos compared against baseline to decide whether both treatments are earning their place.
- Maintenance. PRP spaced out according to how well gains hold, with the medicine continued if you are tolerating it.
Your provider sets any medicine dose and schedule. Starting both treatments on the same day is common too, but it makes it harder to tell later which one is doing the work.
Related question: what should you weigh before adding finasteride?
Mainly the side effects and one lab quirk. In the trials behind the Propecia label, 3.8% of men on finasteride reported a sexual side effect such as lower libido, erection problems or less ejaculate, compared with 2.1% on placebo. The label also lists reports of sexual problems that continued after stopping, and of depression and suicidal thoughts. Our answer on whether finasteride side effects are permanent looks at that evidence in detail.
Finasteride also lowers PSA readings, which matters for prostate screening; see PSA on finasteride. If you are considering a compounded topical version, know that the FDA flagged adverse event reports with those products in 2025.
How Ultimate Male builds a combined plan
PRP is the core of hair restoration at our San Gabriel and Downey clinics. If you already take finasteride, the provider factors it into your timeline and photos. If you are thinking about starting it, you get a straight conversation about benefits, side effects and the PSA effect, and the decision stays yours.
The consultation is an evaluation, so the plan you leave with may be PRP alone, PRP alongside a medicine, or a suggestion that something else fits better. For more on the two treatments head to head, read PRP versus finasteride, and for the pill itself, see finasteride for hair loss.

