From the official label (Oct 2025). Your prescription and pharmacist come first.
What the official label says. If a doctor prescribed it, follow the prescription. Your pack's leaflet comes first if it is different.
Cures most Athlete's Foot (Tinea Pedis), Jock Itch (Tinea Cruris), and Ringworm (Tinea Corporis). Relives discomfort, itching, cracking, burning and scaling, which accompany these conditions.
Do not use on children under two years of age unless directed by a physician. For external use only. Avoid contact with eyes. If irritation occurs or if there is no improvement within four (4) weeks (for Athlete's Foot or Ringworm) or within two (2) weeks (for Jock Itch), discontinue use and consult a physician. Keep this and all drugs out of reach of children. In case of accidental ingestion, seek professional assistance or contact poison control center immediately (800)-222-1222.
Store in dry area at 20-25°C (68-77°F) Keep out of reach of children.
Take it when you remember, unless it is nearly time for the next dose. Then skip the missed one. Never take two doses at once to make up for it. Check your leaflet, as some medicines are different.
Products with Undecylenic acid as the active ingredient. Names differ between countries.
Type the registration number on the pack, or scan it with your camera.
Cures most Athlete's Foot (Tinea Pedis), Jock Itch (Tinea Cruris), and Ringworm (Tinea Corporis). Relives discomfort, itching, cracking, burning and scaling, which accompany these conditions. (From the official U.S. FDA label.)
Follow your prescription or the leaflet in your pack. The official label says: Wash the affected area with soap and water and dry thoroughly. Apply a thin layer of the product over affected area twice daily (morning and night), or as directed by a physician. Supervise children in the use of this product. For Athlete's Foot, pay special attention to spaces between the toes; wear well-fitting, ventilated shoes and change shoes and socks at least once daily.…
In many countries Undecylenic acid is sold without a prescription in some strengths. Rules differ by country, so ask a pharmacist.
Undecylenic acid is sold under names such as Hongo Killer, Tineacide Antifungal, Hongo Killer Treatment, Fungicure Maximum Strength, Fiore, Diaderm, Blis-to-sol Powder, Fungi-nail. Brand names differ between countries.
Store in dry area at 20-25°C (68-77°F)
Scan the registration number on your pack with PillVera (NAFDAC number in Nigeria, NDC in the United States, DIN in Canada), check the expiry date and buy only from licensed pharmacies.
This page shows what official sources say, in plain words. It is not medical advice: your prescription and your doctor or pharmacist come first. Brand names, strengths and rules differ between countries.