Propecia vs. Minoxidil
See how Propecia and Minoxidil compare on approved uses, dosing, side effects, and cost.
Key Takeaways
Propecia is FDA-approved specifically for male pattern hair loss, while oral minoxidil is approved for severe hypertension and used off-label, at low doses, for hair loss.
Propecia works by lowering DHT, the hormone that shrinks hair follicles, while oral minoxidil widens blood vessels and grows hair as a side effect of that action.
Oral minoxidil carries a boxed warning for pericardial effusion and usually needs a diuretic and beta-blocker, while Propecia's main risks are sexual side effects.
Propecia vs. Minoxidil Drug Summary
Propecia
Propecia (finasteride) is a 5-alpha-reductase inhibitor that treats male pattern hair loss by lowering DHT, the hormone that shrinks hair follicles. It comes as a 1 mg tablet taken once daily and is FDA-approved specifically for this use in men.
Minoxidil
Minoxidil is a vasodilator FDA-approved in 1979 for severe hypertension, taken as an oral tablet titrated from 5 mg up to 40 mg daily. At much lower doses, it is used off-label for male and female pattern hair loss, though the FDA has not approved it for that use.
Propecia vs. Minoxidil Side Effects
Propecia
Minoxidil
Propecia vs. Minoxidil Dosage
Propecia
Minoxidil
| STAGE | DOSE | WHEN |
| Starting dose | 1 mg once daily | At the start |
| Maximum dose | 1 mg once daily | Same as starting |
| Dose changes | None | Fixed dose |
| STAGE | DOSE | WHEN |
| Starting dose | 5 mg once daily | At the start |
| Maximum dose | 40 mg once daily | If needed |
| Dose changes | 3 increases | As tolerated |
Propecia
| STAGE | DOSE | WHEN |
| Starting dose | 1 mg once daily | At the start |
| Maximum dose | 1 mg once daily | Same as starting |
| Dose changes | None | Fixed dose |
Minoxidil
| STAGE | DOSE | WHEN |
| Starting dose | 5 mg once daily | At the start |
| Maximum dose | 40 mg once daily | If needed |
| Dose changes | 3 increases | As tolerated |
Propecia vs. Minoxidil Indications
Propecia
Propecia is FDA-approved to treat androgenetic alopecia, or male pattern hair loss, in men. It works by blocking the conversion of testosterone to DHT, the hormone responsible for shrinking hair follicles at the scalp. It is not approved for use in women or children.
FDA-approved for male pattern hair loss
Taken as a 1 mg tablet once daily
For men only, not approved for women
Works by lowering scalp DHT levels
Minoxidil
Oral minoxidil is FDA-approved only for severe, treatment-resistant hypertension, not for hair loss. At much lower doses than the hypertension regimen, it is prescribed off-label for male and female pattern hair loss because it causes hair growth as a side effect. This hair loss use has not been reviewed or approved by the FDA.
FDA-approved for severe hypertension only
Hair loss use is off-label, low-dose
Used in both men and women off-label
Causes hair growth as a side effect
Propecia vs. Minoxidil Pros and Cons
Propecia
Propecia is the only oral medication FDA-approved specifically for male pattern hair loss, with decades of safety data since 1997. Its main drawbacks are sexual side effects and handling restrictions for women who are or may become pregnant.
Pros
Only FDA-approved oral drug for hair loss
Simple once-daily 1 mg dosing, no titration
No cardiovascular monitoring required
Cons
Not approved for use in women
Risk of sexual side effects, some persistent
Costs roughly $100 to $250 per month before savings
May raise risk of a more aggressive prostate cancer
Minoxidil
Oral minoxidil's hair growth effect is a side effect of a blood pressure drug, so its use for hair loss is entirely off-label rather than purpose-built. It also requires closer cardiovascular management, including a boxed warning for pericardial effusion.
Pros
Costs roughly $15 to $40 per month before savings
Can be used off-label in both men and women
Widely available as a low-cost generic tablet
Cons
Not FDA-approved for hair loss at all
Boxed warning for pericardial effusion
Usually requires a diuretic and beta-blocker
Multiple titration steps up to 40 mg daily
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