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Fin5.5

Finasteride

Limited safety

Evidence

Evidence Score5.5/10

Studies: 8

Meta-analyses: 2

Dosage & timing

Dosage:

1 mg once daily for male pattern hair loss (Propecia); 5 mg once daily for benign prostatic hyperplasia (Proscar). A prescription drug — use under a clinician.

Best Time:

Any time

Can take on empty stomach

Form:

Oral tablet (1 mg for hair, 5 mg for BPH)

What you'll notice

💇 Hair retention & regrowthpositive

3-12 months to visible effect

🚽 BPH symptom & progression reliefpositive

Months to years

⚠️ Sexual side effectsnegative

Throughout use; sometimes persistent

Safety

Limited safety

Contraindications:

Women who are or may become pregnant (handling crushed/broken tablets risks feminization of a male fetus)
Children / adolescents
Known hypersensitivity to finasteride

Drug Interactions:

PSA testing / prostate cancer screening
Testosterone / anabolic androgens

Side Effects:

Decreased libido / erectile dysfunction / ejaculatory problemsPersistent sexual dysfunction (post-finasteride syndrome)Depression / anxiety / suicidality signal

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