Hair loss treatment comparison

Four medication options for male pattern hair loss are finasteride, dutasteride, oral minoxidil and topical minoxidil. Finasteride and dutasteride reduce DHT, a hormone involved in follicle miniaturization. Minoxidil supports hair growth through a different mechanism. A clinician may recommend one medication or a combination after weighing the expected benefit, side effects and your preferences.

This guide compares the options without treating them as interchangeable. The source list links to U.S. drug labels and specific studies, including their doses and limitations. For diagnosis and alternatives, see the American Academy of Dermatology's hair-loss guidance.

The short answer

• Considering a first prescription? Finasteride 1 mg is FDA-approved for male pattern hair loss. Its sexual, mood and pregnancy-exposure warnings still need discussion.
• Combination support: finasteride 1 mg + low-dose oral minoxidil 1.25 to 5 mg may be considered when clinically appropriate.
• Incomplete response to finasteride? Recheck the diagnosis, use and safety history before considering dutasteride, with or without minoxidil. More medication is not automatically better.
• Stronger DHT suppression without minoxidil: dutasteride 0.5 mg alone.
• Prefer to avoid oral medication: topical minoxidil 5% is available over the counter; a Bidwell prescription visit is not required to buy it. Ask a clinician if the diagnosis or product warnings are unclear.

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.

Minoxidil's pathway. Minoxidil promotes hair growth without blocking DHT. Its exact hair-growth mechanism is not fully understood. Combining treatments can be useful, but results from one dose or formulation do not establish the benefit or safety of every combination.

Side-by-side comparison

Finasteride 1 mg (Propecia)

Finasteride 1 mg is FDA-approved for male pattern hair loss. In the label's blinded photograph assessment at 12 months, increased growth was seen in 48% of treated men versus 7% with placebo. Maintaining hair is also a useful outcome. These results are not a promise of regrowth at the temples or of recovery of long-standing bald areas. Read the trial outcomes in section 14.

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 an FDA-approved oral option after discussing its 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

In first-year trials, one or more of decreased libido, erectile dysfunction or ejaculation disorder occurred in 3.8% of men taking finasteride and 2.1% taking placebo. The label also records persistent sexual symptoms after stopping, depression and suicidal thoughts or behavior; those postmarketing reports do not establish their frequency. See finasteride side effects and when to get help.

Dutasteride 0.5 mg (Avodart)

Dutasteride blocks both type I and type II 5-alpha reductase. Its U.S. approval is for an enlarged prostate (BPH), not hair loss. In a 24-week randomized trial, 0.5 mg improved measured hair outcomes more than finasteride 1 mg. That does not establish a universal best choice or long-term safety equivalence.

Best for

• Men who've had a partial response to finasteride after 12+ months
• Men whose diagnosis and prior response justify discussing another prescription option
• Men who understand off-label use and accept that dutasteride remains in the body for months

Dosing

The commonly studied hair-loss dose is 0.5 mg once daily, prescribed off-label. Swallow the capsule whole; do not open or chew it. Its half-life is about five weeks at steady state, and drug can remain detectable for four to six months after stopping.

Side effects

Sexual symptoms and breast changes can occur. Dutasteride can affect semen measures; what this means for an individual's fertility is uncertain. It lowers PSA and requires careful interpretation of prostate tests. Do not donate blood while taking it or for at least six months after the last dose. People who are or could be pregnant should not handle dutasteride capsules, especially leaking capsules. Read the label precautions.

Low-dose oral minoxidil 1.25 to 5 mg

Oral minoxidil is an off-label option when a clinician considers systemic treatment appropriate, including when a topical routine has been difficult. It has not been established as universally better than topical treatment. The 2024 randomized trial used 5 mg daily, the upper end of the range Bidwell may prescribe, and did not show superiority on its primary hair-density outcomes.

Best for

• Men who have difficulty with topical treatment and whose clinician finds oral treatment appropriate
• Combined regimens (with finasteride or dutasteride)
• Men with normal blood pressure and no significant cardiac history

Dosing

Bidwell's oral minoxidil range is 1.25 to 5 mg daily, selected by the clinician. Follow your own prescription; do not increase the dose or combine oral and topical minoxidil on your own. Low doses can still affect blood pressure and fluid balance.

Side effects

Possible effects include unwanted facial or body hair, fluid retention, dizziness, headache and a fast heartbeat. The oral drug's boxed warning includes fluid around the heart, which can impair heart function, and worsening angina. These serious risks cannot be ruled out merely because a hair-loss dose is low. Read the boxed warning and patient information.

Topical minoxidil 5% (Rogaine)

Men's 5% topical minoxidil is available without a prescription as foam or solution. It is an established option for pattern hair loss, especially crown thinning. Scalp irritation and the application routine can make continued use difficult, but that does not mean an oral drug is the better or safer choice for everyone.

Best for

• Men who absolutely won't take an oral medication
• Localized thinning where targeted application makes sense
• Men who prefer a nonprescription scalp treatment after checking the product warnings

Dosing

For men's 5% products, the labeled amount is 1 mL of solution or half a capful of foam to the affected scalp twice daily. Apply to a dry scalp, wash your hands afterward and let it dry before bed. Follow that formulation's washing instructions. More product does not produce faster growth. Foam directions.

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, check the formulation-specific label before choosing a product. Our intake and visit model is built around the oral regimens listed above.

Who should not take these medications

Other situations where we decline or refer:

• Patchy or scarring loss: needs an examination to distinguish autoimmune, infectious, traction-related and other causes.
• Sudden diffuse shedding — possible telogen effluvium, thyroid dysfunction, iron deficiency anemia, or recent major illness; needs workup, not a prescription
• Scalp pain, pustules, marked scaling or inflammation: arrange an examination rather than assuming simple pattern loss.
• Uncontrolled cardiovascular disease if oral minoxidil is involved — refer to cardiology first
• Prostate symptoms, abnormal PSA or an active cancer workup: discuss them with the treating clinician. Both DHT blockers can lower PSA, but the effect varies by drug, dose and person.
• Recent chemotherapy or radiation — hair loss in this context is not androgenetic
• Under 18 — minors are outside our scope

Clinicians select oral minoxidil doses from 1.25 mg to 5 mg daily based on the individual’s history, tolerability and response. Standard listed plans use 2.5 mg; the prescription may differ. This use is off-label. Unwanted facial or body hair, swelling and cardiovascular symptoms such as a fast heartbeat are more common at higher doses in published analyses. A higher dose is not automatically a better choice; do not change your dose yourself. Dose-related evidence and its limits.

Side effects across the class

Side effects vary by treatment. Know which symptoms need prompt assessment rather than waiting for the next progress photograph:

• Sexual symptoms: report new or bothersome changes while taking finasteride or dutasteride. Persistent symptoms after stopping have been reported; the first-year trial percentages do not measure that risk.
• Mood changes: stop finasteride 1 mg and seek medical advice for depression or suicidal thoughts. Seek immediate emergency help if you may act on those thoughts or cannot stay safe. EMA's 2025 review established this warning for finasteride tablets; it did not establish the same causal link for dutasteride. Report mood changes on either drug.
• Breast changes: a new lump, pain, enlargement or nipple discharge needs prompt medical assessment.
• Minoxidil symptoms: chest pain, breathing difficulty or fainting need emergency assessment; call 911 for severe or ongoing symptoms. Stop use and seek prompt advice for new swelling, sudden weight gain, dizziness or a racing heartbeat.
• Allergic reactions: swelling of the lips, tongue or throat, or trouble breathing or swallowing, requires emergency help. Stop the suspected medicine.
• Scalp irritation: stop topical minoxidil and ask a clinician if redness or irritation develops; do not apply it to an inflamed or infected scalp.

How to choose

A practical decision framework we use during visits:

1. Pregnancy exposure or fertility plans? Discuss safe handling and reproductive plans before selecting a DHT blocker. Do not treat blood-donation waiting periods as fertility advice.
2. Heart, kidney or blood pressure problems? Discuss them before oral minoxidil. Topical minoxidil also advises consulting a doctor if you have heart disease.
3. Is this your first-ever hair loss treatment? Finasteride alone or finasteride plus low-dose oral minoxidil are common starting paths.
4. Have you been on finasteride 12+ months with incomplete response? Dutasteride, with or without low-dose oral minoxidil, may be considered when clinically appropriate.
5. Do you want stronger DHT suppression but one pill only? Dutasteride-only, available as a clinician-selected cash-pay alternate.
6. Comparing costs? Use the current medication, quantity, visit and delivery details in our hair-loss cost comparison, rather than choosing a medicine by price alone.

The right path depends on your pattern, prior response, goals, and safety screen. The clinician reviewing your visit can recommend a conservative start or a stronger option when appropriate.

How Bidwell's medication paths map to this guide

Hair loss treatment near you

Budgeting for ongoing treatment? Our hair-loss treatment cost comparison separates the visit, medication and shipping, with six- and twelve-month examples for finasteride, oral minoxidil and dutasteride.

Related reading

Frequently asked questions