A minty lather is not a Norwood lock. Photograph the part; do not stop a prescribed 5AR because a bottle said “blocks DHT.”
Ketoconazole 1–2% shampoos appear in small hair studies as anti-inflammatory adjuncts. They are not FDA-approved as androgenetic monotherapy the way 1 mg finasteride is for men. This page will not invent a PMID that “shampoo replaces finasteride.” Related: ketoconazole adjunct evidence and dutasteride-versus-finasteride — different URLs.
Do not raise minoxidil because the shampoo tingled. Do not start oral finasteride from a shampoo aisle. Pregnancy handling still applies to 5AR tablets in the house.
A raw, pus-filled scalp after daily “medical” shampoo is dermatology, not a stronger bottle. This is not medical advice.
Try the free self-check →Sources: AAD ↗
FAQ
Is ketoconazole a DHT blocker like finasteride?
Different mechanism and evidence weight. Shampoo is not a 1 mg substitute.
How often should I use it?
Follow the carton or the clinician. This page is not a frequency PMID.
Can I skip finasteride if I shampoo?
Do not make that swap from HairBase. Pattern is an exam and a prescription story.
Same as ketoconazole-frequency page?
Related wash file, different URL. This essay is “not enough as monotherapy.”
Explore more
⚠️ When to see a doctor — don’t self-treat
- Sudden patchy or circular bald spots
- Redness, scaling, pus, pain or itch (possible scarring alopecia — treat urgently)
- Broken hairs or rapid loss
- Loss with body-wide signs (weight loss, fatigue, cycle changes, acne, extra hair)
- Loss right after a new medication
- Any hair loss in a child