{"id":8800014,"date":"2026-09-09T13:26:29","date_gmt":"2026-09-09T13:26:29","guid":{"rendered":"https:\/\/www.costamedicalservices.com\/spain\/medical-library\/finasteride-vs-dutasteride\/"},"modified":"2026-09-09T13:26:29","modified_gmt":"2026-09-09T13:26:29","slug":"finasteride-vs-dutasteride","status":"publish","type":"page","link":"https:\/\/www.costamedicalservices.com\/sv\/spain\/medical-library\/finasteride-vs-dutasteride\/","title":{"rendered":"Finasteride vs dutasteride for hair loss: what really differs"},"content":{"rendered":"\n<style>.entry-title{display:none!important}.cmsarticle{--ink:#103d56;--muted:#647d8b;--blue:#2d78da;--cyan:#1baec5;--green:#16856f;--line:#d9e7ed;--soft:#f3f8fa;--warn:#fff7e8;--rose:#fff3f3;--shadow:0 18px 44px rgba(16,61,86,.11)}\n.cmsarticle,.cmsarticle *{box-sizing:border-box}.cmsarticle html{scroll-behavior:smooth}.cmsarticle{margin:0;background:#fff;color:var(--ink);font-family:Inter,Arial,sans-serif;line-height:1.68}.cmsarticle 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span{display:block;font-size:11px;color:var(--muted);font-weight:600;margin-top:3px}.cmsarticle .reviewer{display:grid;grid-template-columns:70px 1fr;gap:17px;padding:22px;border:1px solid var(--line);border-radius:18px;margin:30px 0 22px;background:#fff}.cmsarticle .avatar{width:70px;height:70px;border-radius:50%;display:grid;place-items:center;background:linear-gradient(145deg,#daf4f7,#e8eefb);font-size:22px;font-weight:900}.cmsarticle .reviewer h3{margin:0 0 3px}.cmsarticle .reviewer p{font-size:14px;color:var(--muted);margin:0}.cmsarticle .seal{display:inline-block;margin-top:8px;color:var(--green);font-size:12px;font-weight:850}.cmsarticle .sources{font-size:14px;color:var(--muted);border-top:1px solid var(--line);padding-top:24px}.cmsarticle .sources h2{font-size:25px;margin-top:0}.cmsarticle .sources li{margin-bottom:9px}.cmsarticle .cta{margin-top:34px;padding:27px;border-radius:20px;background:var(--ink);color:#fff}.cmsarticle .cta h2{color:#fff;margin:0 0 7px}.cmsarticle .cta p{color:#c7d9e2}.cmsarticle .cta a{display:inline-block;padding:13px 18px;border-radius:12px;background:var(--blue);color:#fff;text-decoration:none;font-weight:850}.cmsarticle .disclaimer{margin-top:20px;padding:19px 21px;border:1px solid #cfdde4;border-radius:16px;background:#f7fafb;color:var(--muted);font-size:12px;line-height:1.6}.cmsarticle .disclaimer strong{display:block;color:var(--ink);font-size:13px;margin-bottom:5px}.cmsarticle .disclaimer p{margin:0}\n@media(max-width:850px){.cmsarticle .layout{grid-template-columns:1fr}.cmsarticle .toc{position:relative;top:auto}.cmsarticle .cards{grid-template-columns:1fr 1fr}.cmsarticle .related-grid{grid-template-columns:1fr}}\n@media(max-width:560px){.cmsarticle .page{padding:13px 15px 60px}.cmsarticle .hero{min-height:690px;padding:27px 21px;background-image:linear-gradient(0deg,rgba(255,255,255,.99) 0%,rgba(255,255,255,.95) 51%,rgba(255,255,255,.06) 75%),var(--hero);background-position:68% center}.cmsarticle .hero h1{font-size:40px}.cmsarticle .dek{font-size:17px}.cmsarticle .layout{gap:26px}.cmsarticle .summary{padding:22px 20px}.cmsarticle article{font-size:16px}.cmsarticle article h2{font-size:28px}.cmsarticle .cards,.cmsarticle .checklist{grid-template-columns:1fr}.cmsarticle .reviewer{grid-template-columns:56px 1fr}.cmsarticle .avatar{width:56px;height:56px;font-size:18px}}\n<\/style>\n<div class=\"cmsarticle\" lang=\"en-GB\"><div class=\"page\"><a class=\"back\" href=\"https:\/\/www.costamedicalservices.com\/spain\/medical-library\/\">\u2190 Return to the Medical Library<\/a><header class=\"hero\" style=\"--hero:url('https:\/\/www.costamedicalservices.com\/wp-content\/uploads\/2026\/09\/hair-02-finasterida-dutasterida.jpg')\"><div class=\"hero-copy\"><div class=\"eyebrow\">Hair health \u00b7 medical guide<\/div><h1>Finasteride vs dutasteride for hair loss: what really differs<\/h1><p class=\"dek\">Differences between finasteride and dutasteride in male alopecia, comparative evidence, authorisation in Spain and safety.<\/p><div class=\"tags\"><span>finasteride<\/span><span>dutasteride<\/span><span>male alopecia<\/span><\/div><div class=\"byline\"><span><strong>Reading:<\/strong> 7\u20139 minutes<\/span><span><strong>Updated:<\/strong> September 1, 2026<\/span><span><strong>Medical review:<\/strong> Dr Paola Blanco<\/span><\/div><\/div><\/header><div class=\"layout\"><nav class=\"toc\" aria-label=\"Content\"><b>In this article<\/b><a href=\"#resumen\">Summary and conclusions<\/a><a href=\"#s1\">Same system, different intensity<\/a><a href=\"#s2\">Authorisation and evidence<\/a><a href=\"#s3\">Safety considerations that should not be minimised<\/a><a href=\"#s4\">A clinical, non-commercial choice<\/a><a href=\"#fuentes\">Sources<\/a><\/nav><article><section class=\"summary\" id=\"resumen\"><div class=\"summary-label\">Summary and conclusions<\/div><h2>The essentials in less than a minute<\/h2><ul><li>Both inhibit 5-alpha-reductase, but do not block exactly the same isoenzymes.<\/li><li>In Spain, finasteride 1 mg has an indication for male androgenetic alopecia; Dutasteride 0.5 mg is approved for benign prostatic hyperplasia, not hair loss.<\/li><li>Short trials have observed greater growth with dutasteride in some groups, but this does not replace an individual decision nor does it make its use authorised for alopecia.<\/li><li>Sexual, reproductive, and mood warnings require clinical conversation.<\/li><\/ul><\/section><section id=\"s1\"><h2>Same system, different intensity<\/h2><p>Finasteride primarily inhibits 5-alpha-reductase type II. Dutasteride inhibits types I and II and reduces dihydrotestosterone more intensely. This pharmacological difference explains the interest in dutasteride, but greater hormonal suppression does not in itself equate to a better option for each patient.<\/p><\/section>\n<section id=\"s2\"><h2>Authorisation and evidence<\/h2><div class=\"table-wrap\"><table><caption>What should be distinguished<\/caption><thead><tr><th>Question<\/th><th>Finasteride<\/th><th>Dutasteride<\/th><\/tr><\/thead><tbody><tr><td>Indicated for alopecia in Spain?<\/td><td>Yes, some presentations of 1 mg in men and defined phases.<\/td><td>No: 0.5 mg presentations are authorised for prostate; Its use for hair loss would be outside the approved indication.<\/td><\/tr><tr><td>Comparative evidence<\/td><td>Extensive experience and hair Summary of Product Characteristics (SmPC).<\/td><td>Some 24-week trials show higher capillary counts, with duration and population limits.<\/td><\/tr><tr><td>Decision<\/td><td>Prescription after assessment.<\/td><td>It requires a clear discussion of its off-label status for hair loss and the available alternatives.<\/td><\/tr><\/tbody><\/table><\/div><\/section>\n<section id=\"s3\"><h2>Safety considerations that should not be minimised<\/h2><p>The EMA confirmed suicidal ideation as an unknown side effect of finasteride tablets. For dutasteride it did not establish a direct link, but it will add preventive information on mood changes by sharing mechanism. Known sexual problems should also be reviewed.<\/p><p>Damaged capsules should not be handled during pregnancy and both medications can affect markers such as PSA, something relevant for other professionals caring for the patient.<\/p><div class=\"warning red\"><h3>Do not change on your own<\/h3><p>Switching from finasteride to dutasteride is not a simple \u201cstep\u201d. It requires reviewing indication, risks, prior treatment and follow-up.<\/p><\/div><\/section>\n<section id=\"s4\"><h2>A clinical, non-commercial choice<\/h2><p>If finasteride is tolerated and stabilizes the loss, the most potent option is not necessarily the best. If the response is insufficient, diagnosis, time, adherence and photographs are first checked. Dutasteride can be discussed in selected contexts, but should not be presented as an authorised routine hair treatment in Spain.<\/p><\/section><section class=\"related\"><h2>Continue on the right route<\/h2><p>Related information and access to medical assessment. Treatment and prescribing decisions require individual review.<\/p><div class=\"related-grid\"><a href=\"https:\/\/www.costamedicalservices.com\/spain\/telehealth\/online-doctor\/\">hair loss<span>Clinical information and consultation<\/span><\/a><a href=\"https:\/\/www.costamedicalservices.com\/spain\/prescriptions\/\">Finasteride<span>Clinical information and consultation<\/span><\/a><a href=\"https:\/\/www.costamedicalservices.com\/spain\/telehealth\/online-doctor\/\">Online medical consultation<span>Clinical information and consultation<\/span><\/a><\/div><\/section><section class=\"reviewer\"><div class=\"avatar\">P.B.<\/div><div><h3>Medically reviewed by Dr Paola Blanco<\/h3><p>Medical information reviewed for clinical coherence, safety and source quality.<\/p><span class=\"seal\">Spanish medical registration 292891820<\/span><\/div><\/section><section class=\"sources\" id=\"fuentes\"><h2>Official and clinical sources<\/h2><ol><li><a href=\"https:\/\/cima.aemps.es\/cima\/dochtml\/ft\/70731\/FichaTecnica_70731.html\">AEMPS \u00b7 Finasteride 1 mg: Summary of Product Characteristics (SmPC)<\/a><\/li><li><a href=\"https:\/\/www.ema.europa.eu\/en\/medicines\/human\/referrals\/finasteride-dutasteride-containing-medicinal-products\">EMA Safety measures for finasteride and dutasteride<\/a><\/li><li><a href=\"https:\/\/pubmed.ncbi.nlm.nih.gov\/24411083\/\">PubMed \u00b7 Comparative trial dutasteride versus finasteride<\/a><\/li><\/ol><p>Regulatory information may change. Always check the Summary of Product Characteristics (SmPC) and the leaflet of the dispensed presentation.<\/p><\/section><section class=\"cta\"><h2>Do you need a medical evaluation?<\/h2><p>We review pattern, evolution, history and treatments to decide if online management is appropriate or if you need in-person dermatology.<\/p><a href=\"https:\/\/www.costamedicalservices.com\/spain\/telehealth\/online-doctor\/\">See medical consultation<\/a><\/section><aside class=\"disclaimer\"><strong>Notice about AI and medical information<\/strong><p>This article has been prepared with the help of artificial intelligence and may contain errors, inaccuracies or omissions. It is offered as general guidance and never replaces consultation, examination, diagnosis, package insert or pharmaceutical advice. Do not start, stop, or modify medications or delay urgent care based on this content alone.<\/p><\/aside><\/article><\/div><\/div><\/div><script type=\"application\/ld+json\">{\"@context\":\"https:\/\/schema.org\",\"@type\":\"MedicalWebPage\",\"name\":\"Finasteride vs dutasteride for hair loss: what really differs\",\"description\":\"Differences between finasteride and dutasteride in male alopecia, comparative evidence, authorisation in Spain and safety.\",\"datePublished\":\"2026-09-01\",\"dateModified\":\"2026-09-09\",\"inLanguage\":\"en-GB\",\"author\":{\"@type\":\"MedicalOrganization\",\"name\":\"Costa Medical Services\"},\"keywords\":\"finasteride, dutasteride, male alopecia\",\"url\":\"https:\/\/www.costamedicalservices.com\/spain\/medical-library\/finasteride-vs-dutasteride\/\",\"mainEntityOfPage\":\"https:\/\/www.costamedicalservices.com\/spain\/medical-library\/finasteride-vs-dutasteride\/\",\"publisher\":{\"@type\":\"MedicalOrganization\",\"name\":\"Costa Medical 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