Assielf Antifungal Pen
Undecylenic acid · Liquid · Topical
Active ingredient
Active ingredient......PurposeUndecylenic acid 25%.........Antifungal
Purpose
Cures most Athlete's Foot (Tinea Pedis) and Ringworm(Tinea Corporis). Relieves itching, scaling, cracking, burning,redness, sorenes, and irritation and discomfort.Helpsprevent most athlete's foot (dermatophytosis) with daily use.
Uses
For external use only. Do not use on children under 2 years of age unless directedby a doctor. When using this product, avoid contact with eyes.Stop use and ask a doctor if irritation occurs, there is noimprovement within 4 weeks (for athlete's foot andringworm).
Warnings
Store at room temperature 15-30 C (59-86°F）
Keep out of reach of children
Keep out of reach of children. If swallowed, get medical helpor contact a Poison Control Center right away.
Directions
Directions For athlete's foot and ringworm: use daily for 4 weeks. Cleanthe affected area and dry thoroughly. Apply a thin layer ofthe product over affected area twice daily (morning andnight) or as directed by a doctor. Supervise children in theuse of this product. This product is not effective for thetreatment of ringworm of the scalp or nails. For athlete's foot:pay special attention to spaces between the toes, wearwell-fitting, ventilated shoes, and change shoes and socks atleast once daily. To prevent athlete's foot, apply once ortwice daily(morning and/or night). Apply to skin around thenail and cuticle.
Inactive ingredients
water, euphorbia hirta whole, glycerin,hydracrylic acid,pseudolarix amabilis bark, resorcinol.
Label text from the FDA structured product label by Shenzhen Yuanbang International Logistics Co., Ltd (revised Feb 8, 2026). Long sections are shortened; the complete label is on DailyMed.
Active ingredients
- Undecylenic Acid in 1 product
Assielf Antifungal Pen NDC products (1)
| NDC | Strength & form | Labeler | Type |
|---|---|---|---|
| 87418-002 | Undecylenic Acid 25 g/100mL Liquid | Shenzhen Yuanbang International Logistics Co., Ltd | OTC MONOGRAPH DRUG |
Frequently asked questions
What is Assielf Antifungal Pen used for?
For external use only. Do not use on children under 2 years of age unless directedby a doctor. When using this product, avoid contact with eyes.Stop use and ask a doctor if irritation occurs, there is noimprovement within 4 weeks (for athlete's foot andringworm).
Who makes Assielf Antifungal Pen?
Assielf Antifungal Pen is listed by 1 labeler in the FDA NDC directory, including Shenzhen Yuanbang International Logistics Co., Ltd.