Fungi-Nail Side Effects
Generic name: undecylenic acid topical
Medically reviewed by Drugs.com. Last updated on Jun 13, 2025.
Note: This document provides detailed information about Fungi-Nail Side Effects associated with undecylenic acid topical. Some dosage forms listed on this page may not apply specifically to the brand name Fungi-Nail.
Applies to undecylenic acid topical: topical cream, topical powder, topical solution, topical tincture.
If your skin problem does not improve within 4 weeks, or if it becomes worse, check with your health care professional.
To help prevent reinfection after the period of treatment with this medicine, the powder or spray powder form of this medicine may be used each day after bathing and careful drying.
Serious side effects of Fungi-Nail
Along with its needed effects, undecylenic acid topical (the active ingredient contained in Fungi-Nail) may cause some unwanted effects. Although not all of these side effects may occur, if they do occur they may need medical attention.
Check with your doctor as soon as possible if any of the following side effects occur while taking undecylenic acid topical:
- Skin irritation not present before use of this medicine
See also:
Frequently asked questions
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Further information
Fungi-Nail side effects can vary depending on the individual. Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.
Note: Medication side effects may be underreported. If you are experiencing side effects that are not listed, submit a report to the FDA by following this guide.