Four medications have enough real-world evidence behind them to be considered standard of care for male pattern hair loss (androgenetic alopecia): finasteride, dutasteride, oral minoxidil, and topical minoxidil. They fall into two mechanistic camps — the 5-alpha reductase inhibitors (finasteride, dutasteride) that reduce scalp DHT, and the vasodilators (topical and oral minoxidil) that extend the anagen (growth) phase of the hair cycle. Most good protocols combine one from each camp.
This guide walks through every medication in depth, compares them in a single table, and lays out which combination tends to fit which situation. It references FDA prescribing information, the American Academy of Dermatology's hair loss materials, and the peer-reviewed evidence base summarized in the recent JAMA Dermatology reviews on androgenetic alopecia.
Start a hair loss visit — $45 flat See our three plansThe short answer
- First-time patient, early pattern loss, lowest risk: finasteride 1 mg daily (our Starter plan).
- Best results for most men: finasteride 1 mg + low-dose oral minoxidil 2.5 mg (our Growth plan).
- Aggressive loss, or finasteride non-response: dutasteride 0.5 mg + low-dose oral minoxidil 2.5 mg (our Max plan).
- Stronger DHT suppression without minoxidil: dutasteride 0.5 mg alone.
- Will not touch an oral medication: topical minoxidil 5% — Bidwell doesn't prescribe topicals currently; see a local dermatologist.
How each drug works
The DHT pathway. In male pattern hair loss, scalp hair follicles are genetically sensitive to dihydrotestosterone (DHT). DHT binds receptors on the follicle and shortens its growth phase cycle after cycle, producing the progressively thinner, shorter hairs called "miniaturization." Eventually the follicle stops producing a visible hair at all. Finasteride and dutasteride block the enzyme (5-alpha reductase) that converts testosterone to DHT, lowering scalp and serum DHT and allowing the affected follicles to resume normal cycling — if they haven't been completely miniaturized away.
The vasodilator pathway. Minoxidil opens potassium channels in vascular smooth muscle and was originally developed as an antihypertensive. When applied topically or taken in low oral doses, it dilates the perifollicular vasculature and extends anagen (the active growth phase). It doesn't lower DHT, so it's complementary to finasteride or dutasteride, not a substitute. Combining one DHT blocker with one minoxidil formulation consistently beats either alone in head-to-head trials.
Side-by-side comparison
| Attribute | Finasteride | Dutasteride | Oral Minoxidil | Topical Minoxidil |
|---|---|---|---|---|
| Brand names | Propecia, Proscar | Avodart | Loniten (brand is high-dose) | Rogaine |
| Drug class | 5-AR inhibitor (Type II) | 5-AR inhibitor (Type I & II) | Vasodilator | Vasodilator |
| FDA status for hair loss | Approved (1 mg, 1997) | Off-label in US | Off-label at hair-loss doses | Approved (5% solution/foam) |
| Typical dose | 1 mg once daily | 0.5 mg once daily | 1.25–2.5 mg once daily | 1 mL 5% twice daily |
| Serum DHT suppression | ~70% | ~90% | Not applicable | Not applicable |
| Half-life | 6–8 hours | 4–5 weeks | ~4 hours | Not applicable (topical) |
| Time to visible results | 3–6 months, peak 12 mo | 3–6 months, peak 12 mo | 3–6 months, peak 12 mo | 4–6 months, peak 12 mo |
| Common side effects | Rare sexual effects (~1–2%), mood, rare gynecomastia | Similar to finasteride, slightly higher sexual side effect signal | Hypertrichosis, edema, lightheadedness | Scalp irritation, dryness, unwanted facial hair from drift |
| 12-month adherence | High (~80%) | High (~80%) | High (~80%) | Low (~50%) |
| Contraindicated in | Women of childbearing potential | Women of childbearing potential | Uncontrolled cardiac disease | Severe scalp dermatitis |
| Typical cash cost (monthly) | $15–30 | $20–40 | $10–20 | $25–45 |
Finasteride 1 mg (Propecia)
The original and still the most studied hair loss medication. Finasteride is FDA-approved at 1 mg daily for male pattern hair loss since 1997. In pivotal trials, ~65% of men showed measurable hair regrowth at 12 months and over 90% stopped losing additional hair — one of the strongest maintenance effects of any treatment in dermatology.
Best for
- First-line treatment for men in their 20s, 30s, or 40s noticing early to moderate crown or frontal thinning
- Anyone who wants the simplest possible regimen (one pill)
- Men who prefer the longest track record of safety data
Dosing
1 mg orally once daily, taken at any time, with or without food. Works best taken consistently at the same time each day. Effects reverse within 6–12 months after stopping.
Side effects
Most men report nothing. Reported rates in the original 1997 pivotal trial: decreased libido (1.8%), erectile dysfunction (1.3%), ejaculatory changes (1.2%) — each only slightly above placebo. Post-marketing reports have raised concerns about persistent symptoms after discontinuation ("post-finasteride syndrome"), which remains controversial in the dermatology literature. Our providers discuss this openly during the visit.
Dutasteride 0.5 mg (Avodart)
Dutasteride is a more potent 5-alpha reductase inhibitor than finasteride because it blocks both isoforms of the enzyme. It's FDA-approved for BPH (benign prostatic hyperplasia) in the US, but is widely used off-label for hair loss, particularly in Asian countries where it's actually been approved for hair loss (South Korea, Japan). Head-to-head trials show dutasteride produces somewhat greater hair counts and diameter than finasteride.
Best for
- Men who've had a partial response to finasteride after 12+ months
- Aggressive pattern loss in men under 35
- Those willing to trade a slightly higher side-effect risk for stronger DHT suppression
Dosing
0.5 mg orally once daily. Because of its long half-life (~5 weeks), it takes months to reach steady state and months to wash out after stopping.
Side effects
Very similar profile to finasteride, with perhaps a slightly higher signal for sexual side effects in meta-analyses. Because dutasteride suppresses DHT more completely, some men report more pronounced libido changes. Like finasteride, it's strictly contraindicated in women of childbearing potential.
Low-dose oral minoxidil 1.25–2.5 mg
Oral minoxidil at hair-loss doses is the fastest-growing treatment trend in dermatology right now. It avoids the scalp mess and adherence drop-off of topical minoxidil, and emerging evidence (Penha 2022, Vañó-Galván 2021, a 2022 systematic review in JAAD) suggests efficacy at 1.25–2.5 mg daily is comparable or superior to topical 5% — with dramatically better adherence.
Best for
- Anyone who couldn't stick with topical minoxidil
- Combined regimens (with finasteride or dutasteride)
- Men with normal blood pressure and no significant cardiac history
Dosing
1.25 mg orally once daily, typically at night. Some patients move to 2.5 mg after tolerance is established. At these doses it's far below the starting antihypertensive dose (5 mg) and systemic blood pressure effects are usually mild.
Side effects
Mild fluid retention (especially in the first weeks), transient lightheadedness, palpitations, and hypertrichosis — unwanted hair growth on the forehead, upper cheeks, arms, or back. Hypertrichosis is the most common reason men stop. Reversible within weeks of discontinuation.
Topical minoxidil 5% (Rogaine)
The OG over-the-counter hair loss treatment, FDA-approved for men since 1988. It works, but the evidence on real-world adherence is brutal — studies consistently show 30–50% of users quit within the first 12 months due to scalp irritation, greasy residue, or simply forgetting twice-daily application. Foam formulations are better tolerated than solution.
Best for
- Men who absolutely won't take an oral medication
- Localized thinning where targeted application makes sense
- Add-on therapy when cardiovascular considerations rule out oral minoxidil
Dosing
1 mL of 5% solution applied to the dry scalp twice daily, or one cap of 5% foam twice daily. Takes 4+ hours to fully absorb; avoid washing or sleeping on wet scalp.
Bidwell doesn't currently prescribe topical minoxidil
Topical minoxidil is available over the counter at any US pharmacy — no prescription required. If you want topical specifically, we recommend buying generic 5% foam at any retail pharmacy. Our intake and visit model is built around the oral regimens listed above.
Who should not take these medications
Finasteride and dutasteride are absolutely contraindicated in women who are pregnant or may become pregnant.
These drugs can cause serious developmental abnormalities of the external genitalia in male fetuses. The FDA warns that even handling a broken or crushed finasteride or dutasteride tablet can cause absorption through the skin sufficient to pose a theoretical risk. Bidwell does not prescribe finasteride or dutasteride to women. Women with pattern hair loss should see a dermatologist; typical treatments include spironolactone, topical minoxidil, and/or workup for contributors like thyroid disease, iron deficiency, and PCOS.
Other situations where we decline or refer:
- Patchy, coin-shaped, or scarring hair loss — likely alopecia areata or a scarring alopecia; needs in-person dermatologic evaluation
- Sudden diffuse shedding — possible telogen effluvium, thyroid dysfunction, iron deficiency anemia, or recent major illness; needs workup, not a prescription
- Scalp pain, pustules, scale, or visible inflammation — likely a primary scalp disorder
- Uncontrolled cardiovascular disease if oral minoxidil is involved — refer to cardiology first
- Active prostate cancer or elevated PSA under monitoring — finasteride and dutasteride lower PSA by roughly 50%, complicating interpretation; coordinate with urology
- Recent chemotherapy or radiation — hair loss in this context is not androgenetic
- Under 18 — minors are outside our scope
Side effects across the class
Most men on any of these medications report nothing. The serious but rare events to know:
- Persistent sexual side effects (finasteride, dutasteride) — reported rate 1–2% above placebo in trials; post-marketing reports suggest a small number of men experience symptoms that don't resolve on discontinuation. Stop and report if symptoms persist.
- Mood changes (finasteride, dutasteride) — emerging data suggest a small signal for new depressive symptoms. Honest self-monitoring matters.
- Gynecomastia (finasteride, dutasteride) — rare; usually resolves on discontinuation
- Palpitations, edema, lightheadedness (oral minoxidil) — usually mild and early; severe or persistent effects warrant stopping and cardiology referral
- Hypertrichosis (oral minoxidil) — unwanted body/facial hair; reversible, but the most common reason patients stop
- Contact dermatitis (topical minoxidil) — tolerable for most, but the #1 adherence killer
How to choose
A practical decision framework we use during visits:
- Could you be pregnant, or is your partner trying to conceive? Pregnant partners handling broken tablets is a low-but-real concern. Ask us about routing — we're strict on this.
- Do you have uncontrolled cardiovascular disease or untreated hypertension? Skip oral minoxidil. Finasteride or dutasteride alone is still a reasonable monotherapy.
- Is this your first-ever hair loss treatment? Start with our Starter plan (finasteride alone) or Growth (finasteride + oral minoxidil).
- Have you been on finasteride 12+ months with incomplete response? Max plan (dutasteride + oral minoxidil) is where most non-responders go.
- Do you want stronger DHT suppression but one pill only? Dutasteride-only, available as a $45 clinician-selected alternate.
- Cost-sensitive but committed? Generic finasteride alone is the highest-value single agent in the space.
Most Bidwell patients select Growth or Max after reading the comparison. If you're unsure, start with Growth and escalate later — downshifting is easier than recovering lost ground.
How Bidwell's plans map to this guide
| Plan | Regimen | Who picks it |
|---|---|---|
| Starter | Finasteride 1 mg daily | First-timers, early pattern loss, most cautious profile |
| Growth (most popular) | Finasteride 1 mg + oral minoxidil 2.5 mg | Balanced potency — DHT suppression plus growth stimulation |
| Max Strength | Dutasteride 0.5 mg + oral minoxidil 2.5 mg | Advanced loss or finasteride non-response |
| Dutasteride-only | Dutasteride 0.5 mg daily | Stronger DHT blocker without adding minoxidil |
Hair loss treatment near you
Related reading
Frequently asked questions
Which hair loss medication works best?
For most men with classic male pattern hair loss, finasteride is the best-evidenced first-line treatment — FDA-approved for hair loss, widely studied, and inexpensive. Oral minoxidil is a strong adjunct that adds measurable thickening on top of finasteride. Dutasteride is a stronger DHT blocker reserved for men who don't respond to finasteride or who have more aggressive loss. Topical minoxidil works but has well-documented adherence problems.
How is finasteride different from dutasteride?
Both block 5-alpha reductase, but differently. Finasteride blocks only Type II and suppresses serum DHT roughly 70%. Dutasteride blocks both Type I and Type II and suppresses DHT approximately 90%. Dutasteride has a much longer half-life (4–5 weeks vs 6–8 hours) so it lingers in the body after stopping. Finasteride is FDA-approved for hair loss; dutasteride is off-label in the US and approved only for BPH.
Is oral minoxidil safer than topical?
Low-dose oral minoxidil (1.25–2.5 mg) has an excellent safety record in healthy adults and avoids the scalp irritation, mess, and adherence problems of the topical. However, it can cause fluid retention, mild blood pressure drops, and hypertrichosis. Topical minoxidil stays mostly local to the scalp, so cardiovascular effects are minimal, but systemic absorption is not zero. Most men find oral more convenient, provided they pass cardiovascular screening.
Who should not take finasteride or dutasteride?
Women who are pregnant, may become pregnant, or are breastfeeding must avoid both — these drugs can cause serious birth defects in male fetuses. Men with active liver disease, a history of prostate cancer under active monitoring, or a personal history of major depression on these drugs should discuss alternatives with their provider. Bidwell does not prescribe finasteride or dutasteride to women.
How much does hair loss treatment cost at Bidwell?
$45 flat, one-time visit fee. No subscription. Medication cost is separate and paid at your pharmacy. With a GoodRx coupon, generic finasteride runs $15–30/month, generic dutasteride $20–40/month, and generic oral minoxidil $10–20/month. Annual cost typically lands between $180 and $400 — dramatically less than subscription services charging $25–50 every month.
Do you treat women for hair loss?
Not at launch. Our hair loss workflow is currently limited to adult men with classic male pattern hair loss. Finasteride and dutasteride are strictly contraindicated in women of childbearing potential, and female pattern hair loss often requires different agents (spironolactone, topical minoxidil) and workup for thyroid/iron/PCOS. We plan to add a female hair loss lane in the future.
How long until I see results?
Hair regrowth is slow. Expect several months before visible improvement on any of these medications, with the biggest changes typically at 6–12 months. Many men experience a temporary "dread shed" during months 1–3 as dormant follicles enter a new cycle — this is a sign the medication is working, not failing. Results plateau around 12–18 months. Consistency matters more than the specific drug — stopping treatment reverses gains within 6–12 months.
Reviewed against FDA prescribing information (DailyMed), the American Academy of Dermatology materials on androgenetic alopecia, JAMA Dermatology reviews, and the peer-reviewed literature on oral minoxidil (Penha 2022, Vañó-Galván 2021). Last updated April 15, 2026.