If you are in crisis: Samaritans 116 123 (free, 24/7), text SHOUT to 85258, NHS 111, or attend your nearest A&E.

Safe discontinuation

How to safely stop finasteride 1 mg

Patients consider stopping finasteride for a range of reasons including side effects, partner pregnancy planning, satisfaction with current density, or switching to dutasteride.

Common reasons patients consider stopping

• • New or worsening side effects (sexual, mood, or other)
• • Partner is pregnant or planning pregnancy (handling precautions)
• • Stable density achieved and questioning whether to continue
• • Switching to dutasteride or to a topical-only regimen
• • Cost or adherence pressure

What the MHRA says

MHRA Drug Safety Updates 29 April 2024 and 11 May 2026 acknowledge that psychiatric (depression, suicidal thoughts) and sexual side effects (reduced libido, erectile dysfunction, ejaculation disorders) have been reported to persist after stopping in a small number of cases.

The pharmacology of stopping

Pharmacologically, finasteride is cleared within days (~6-hour half-life). Serum DHT returns to baseline within approximately 2 weeks. Hair benefit accrued over years of treatment is typically lost over 6 to 12 months without ongoing therapy, but the exact regression varies between individuals.

Half-life

Approximately 6 hours (Propecia SmPC).

After stopping

Serum DHT returns to baseline within approximately 2 weeks.

Hair timeline

Density gained typically regresses over 6 to 12 months. Hair maintained against further loss will resume the underlying androgenetic alopecia trajectory.

What to expect for your hair

Over 6 to 12 months, hair density typically returns toward the pre-treatment trajectory. The benefit accumulated during years of treatment is real but not retained without the medication.

How to stop, step by step

1. Speak to your prescriber before stopping

   Confirm the reason for stopping, document any current side effects (especially mood or sexual), and ask whether a switch (e.g. to topical only) might address the concern without complete cessation.

2. Decide between taper and cold-turkey

   Finasteride does not require a taper pharmacologically (no physiological dependence). Some patients prefer to halve the dose for 2 to 4 weeks for psychological transition; others stop in one step. Both are clinically reasonable.

3. Continue topical minoxidil if appropriate

   If you are stopping finasteride but want to retain density, continuing topical minoxidil under clinician guidance can be a reasonable bridging approach.

4. Monitor for symptom resolution

   Most side effects resolve within weeks of stopping. The MHRA DSUs specifically recognise that in a small number of cases sexual or psychiatric symptoms may persist; if this occurs, contact us promptly and report via the MHRA Yellow Card scheme.

5. Review hair at 3, 6 and 12 months

   Document density with consistent lighting and angle photography so the regression trajectory is visible. This makes any decision to restart, switch or transition to surgery clinically informed.

When to seek urgent care

If you experience new or worsening thoughts of self-harm or suicide, contact Samaritans on 116 123 (free, 24/7), NHS 111, or attend your nearest Accident and Emergency department immediately.

Bloods to help the decision

A pre- and post-stopping bloodwork plan helps you and your prescriber see what is actually happening, rather than rely on impressions. Our sister diagnostic service, WMG Health, offers panels designed around the question you are asking:

• Hormone baseline before stopping: total testosterone, free testosterone, SHBG, oestradiol, prolactin. The Hormone Specialist panel from £299, or a custom panel if you want something more targeted (from £275).
• Hair density and nutritional baseline: ferritin, thyroid, vitamin D, B12. Hair Loss Essentials from £249.
• Custom workup for your specific question: if you have side effects you want investigated (mood, sleep, energy, libido), a clinician-designed custom panel is usually the best route. Quote within 1 working day.

Same Westminster Medical Group, single clinical record, results visible to your WMG Meds prescriber.

Want a clinician to review your stopping plan?

Book a discontinuation review with a WMG GMC-registered doctor. We will walk through the timing, alternatives, monitoring and any bloodwork that helps the decision feel informed.

Thinking about stopping?

Do it with a clinician, not on your own

Stopping hair loss treatment has predictable consequences that are much easier to manage when they are planned for. A GMC-registered doctor can talk through the timeline, what to expect, and whether a different regimen would suit you better than stopping altogether.

If you are having thoughts of harming yourself, do not wait for a review. Contact your GP, call 111, or call the Samaritans free on 116 123 at any time. In an emergency call 999.