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Início / Medicamentos de A a Z / Undecylenic acid

Undecylenic acid

Cures most Athlete's Foot (Tinea Pedis), Jock Itch (Tinea Cruris), and Ringworm (Tinea Corporis). Relives discomfort, itching, cracking, burning and s.

Checked against the official label · Updated

Vendido sem receita médica em alguns países Topical

Undecylenic acid: quick answers

Used for
Cures most Athlete's Foot (Tinea Pedis), Jock Itch (Tinea Cruris), and Ringworm (Tinea Corporis).
Children
Supervise children in the use of this product.
Prescription
Sold without prescription in the United States; rules differ by country.

From the official label (Oct 2025). Your prescription and pharmacist come first.

How to use Undecylenic acid

O que diz a bula oficial. Se um médico receitou, siga a receita. Se a bula da sua caixa for diferente, vale a da sua caixa.

Para quem é

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.

Como tomar e com que frequência
  • 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
  • For Athlete's Foot and Ringworm, use daily for four weeks; for Jock Itch, use daily for two weeks
  • If condition persists longer, consult a physician
  • This product is not effective on the scalp or nails
  • Wash hands after each use
Warnings

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.

How to store it

Store in dry area at 20-25°C (68-77°F) Keep out of reach of children.

Se esquecer uma dose

Tome assim que lembrar, a menos que esteja quase na hora da próxima dose. Nesse caso, pule a dose esquecida. Nunca tome duas doses de uma vez para compensar. Confira a bula, pois alguns medicamentos são diferentes.

From the official U.S. FDA label for this active ingredient. Your pack may have a different strength, so always read its leaflet. If a doctor prescribed it, follow the prescription. Ask a pharmacist if you are unsure. Label dated 2025-10-14.

Check your pack of Undecylenic acid

Type the registration number on the pack, or scan it with your camera.

Ou tire fotos da caixa
Restam 3 verificações grátis hoje Official sources: U.S. FDA · EMA (EU) · Health Canada · WHO alerts

Questions about Undecylenic acid

What is Undecylenic acid used for?

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.)

How do I take Undecylenic acid?

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.…

Do I need a prescription for Undecylenic acid?

In many countries Undecylenic acid is sold without a prescription in some strengths. Rules differ by country, so ask a pharmacist.

What brands contain Undecylenic acid?

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.

How should I store Undecylenic acid?

Store in dry area at 20-25°C (68-77°F)

How can I check that my Undecylenic acid is genuine?

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.

Sources

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.