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Probe · finasteride · 3 min read

What happens if you stop finasteride 1 mg?

Hair loss can resume. Withdrawal of finasteride 1 mg leads to reversal of effect within 12 months. Finpecia 1 mg has no labelled taper. In the vertex extensions, men who left PROPECIA for placebo after year one lost the hair-count increase by month 24. Stop now if mood or function collapses. Do not treat a quiet month as a cure.

Medically reviewed by Dr. Mateo Ruiz, MD - Clinical pharmacology, Barcelona

Last reviewed

Updated

01If you restart after a year away

Forest-green still life: calendar after a gap, empty blister

Men who began drug after a placebo year still gained count, but the 1-year on-drug gain sat lower than in men who started immediately (56 versus 91 hairs above original baseline). Restart is possible. It is not a free return to the old absolute count.

Restart only if the hair indication still fits and the clinician agrees. The 1 mg vault keeps that indication.

02What the switch-off hair counts showed

Forty-eight men moved from PROPECIA to placebo at the end of the first 12 months. The increase in hair count reversed 12 months later, at 24 months.

That is a small extension arm, not a new trial. It matches the Dosage reversal sentence. The stay-on probe is the opposite job.

03When mood is the reason you stop

Depression, including suicidal ideation and behavior, is in the postmarketing psychiatric list. Hair gain does not outrank that. Call. The mood probe stays on those reports.

Finpecia 1 mg does not get a 'finish the pack first' rule when mood drops.

04Why there is no labelled 1 mg taper

The US 1 mg label does not print a step-down schedule. When you stop, you stop. Do not invent a 0.5 mg sprinkle by crushing tablets.

Crushing also reopens the pregnancy-handling warning. Whole tablets or none.

05Sexual symptoms after the last tablet

Postmarketing reports include sexual dysfunction that continued after discontinuation. The label does not attach a percent. Report what continues.

Resolution also occurred in men who stopped because of sexual effects during the trials. Both sentences can be true for different men.

06The 12-month reversal line

Dosage is blunt: withdrawal of treatment leads to reversal of effect within 12 months. The follicle is not permanently reset. Daily exposure was the course.

That clock is for hair. It is not a reason to stay on through a mood crash or a pregnancy-handling problem in the house.

Sources

  1. DailyMed PROPECIA (finasteride) 1 mg
  2. US Propecia PI section 2 and section 14.1 discontinuation arm.

Checked against the current label and reviewed by Dr. Mateo Ruiz. See Probe, Assay, Glow-check, Seal.

Vault consult

Answers follow the U.S. Propecia label.

Ingrid A. I stopped Finpecia 1 mg two months ago. Is the hair already gone?

Vault reply

The labelled reversal window is within 12 months, not 12 days. Two months is early for a final hair read and late to assume nothing will change. If you meant to stay on, call about restarting 1 mg.

Malik R. Should I taper 1 mg to avoid a rebound?

Vault reply

No labelled taper exists for finasteride 1 mg. Do not crush tablets to invent 0.5 mg. Stop, or stay, as a whole 1 mg decision.

Sophie L. The extension said counts reversed at 24 months after a switch. Is that my clock?

Vault reply

Sixty-five men had a year on drug then placebo; the count gain reversed 12 months later (month 24). Dosage already says reversal within 12 months of withdrawal. The arm illustrates the sentence. It is not a personal calendar.

Before you start, stop, or change any medicine, speak with your prescriber or pharmacist - they hold your chart, this vault card does not. Open the vault disclaimer.