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Hair guideShould I taper off finasteride?

Should I taper off finasteride?

✓ 医学的に検証✍️ HairBase編集部📅 最終更新: 2026年6月14日⏱ 1分で読了
💡 まず結論

People taper antidepressants with protocols. Finasteride for hair is not that monograph. Halving a film-coated tablet is still a handling problem if someone who may be pregnant lives there.

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Propecia-style prescribing information is written for a daily 1 mg film-coated tablet in men with androgenetic alopecia. It does not publish a 0.25 mg every-other-day “wean” as an FDA-endorsed hair protocol. Some clinicians discuss dose changes; that is their licence, not a Reddit spreadsheet. After stopping, DHT-related miniaturisation can resume and a shed can appear — timing varies. The American Academy of Dermatology discusses 5-alpha-reductase inhibitors as prescription options with sexual and pregnancy counselling. This page will not invent a 90-day reverse titration and is not medical advice.

If you stop because of side effects, call the prescriber rather than micro-dosing leftover pills. Compounded topical finasteride is a different exposure story. Dutasteride has a longer half-life and blood-donation rules on this site’s other page. Do not donate the “taper leftovers” as a plan.

Mood change, breast tenderness, or sexual side effects are clinician visits, not a reason to crush tablets. This is not medical advice.

妊娠に関する警告: フィナステリドとデュタステリドは、発育中の男児胎児に害を及ぼす可能性があります。妊娠中または妊娠の可能性がある場合は、服用したり扱ったりしないでください。
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📚 根拠・出典

出典: AGA review (CCID) ↗

よくある質問

Does a slow taper prevent post-finasteride shedding?

There is no labelled wean that guarantees that. Shedding after stop is a known worry. Ask the prescriber.

Can I take 1 mg every other day as a taper?

That is off-script unless your prescriber wrote it. Do not split tablets if pregnancy is possible in the home.

Will one missed week ruin years of use?

Hair drugs are chronic experiments. A week is not a moral failure. Restart only as advised. Do not double up.

Switch to saw palmetto instead?

Saw palmetto is not a labelled 1 mg equivalent. Herbal DHT stories are marketing, not a substitute insert.

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⚠️ 医師の診察を受けるべきとき — 自己治療しないで

  • 突然のまだら、または円形のはげ
  • 赤み・鱗屑・膿・痛み・かゆみ(瘢痕性脱毛の可能性 — 緊急に治療を)
  • 切れ毛、または急速な脱毛
  • 全身性の徴候を伴う脱毛(体重減少、倦怠感、月経の変化、ニキビ、毛の増加)
  • 新しい薬の直後の脱毛
  • 子どものあらゆる脱毛
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