What Is Finasteride?
Finasteride is an FDA-approved oral medication used primarily to treat androgenetic alopecia, or pattern hair loss. It works by inhibiting the enzyme 5-alpha-reductase, which converts testosterone into DHT (dihydrotestosterone)—a hormone that causes follicular shrinkage and hair thinning. By lowering scalp DHT levels, finasteride helps preserve existing follicles and promote regrowth.
Originally introduced as a prostate treatment, it was later found to significantly slow male pattern baldness. Recent studies have shown promising results for postmenopausal women under dermatologist supervision.
Optimal Dosage and Form
The standard dosage for finasteride is 1 mg daily. Some dermatologists prescribe low-dose finasteride (0.5 mg or less) for women or individuals sensitive to hormonal changes. In 2024, topical finasteride formulations gained popularity, offering localized DHT reduction with fewer systemic side effects.
Combining with Other Treatments
For best results, finasteride is often paired with topical minoxidil. A 2023 clinical meta-analysis published in the Journal of Dermatological Therapy found that this combination increased hair density by 35% over monotherapy. Additional complementary therapies include microneedling and low-level laser therapy (LLLT), both of which enhance follicle responsiveness.
Side Effects and Misconceptions
Common side effects include decreased libido or mild fatigue, though these affect less than 2% of users. Most resolve upon discontinuation. Myths about permanent hormonal imbalance are largely unsupported by scientific evidence. Nonetheless, regular follow-ups with a dermatologist are advised, especially during the first six months.
Who Should Avoid Finasteride
Pregnant women should not handle crushed tablets, as finasteride can affect fetal development. Individuals with existing hormonal disorders or liver disease should consult a specialist before use. Always take the medication at the same time daily for consistent results.
Expert Recommendation
According to Dr. Emily Hartman, “Finasteride remains one of the most effective DHT-blocking treatments in dermatology. With proper monitoring, it provides safe, long-term hair restoration in over 80% of patients.”
