Before using over-the-counter permethrin, understand potential side effects. Most people experience mild reactions.
Common Side Effects
- Burning or stinging sensation at application site Temporary redness or rash Mild itching
These typically resolve quickly after treatment stops. If they persist or worsen, discontinue use and consult a doctor.
Less Common but Important Side Effects
- Severe allergic reactions (rare but requiring immediate medical attention; symptoms include difficulty breathing, swelling of the face, lips, or tongue, hives).
Allergic reactions need prompt medical help. Seek immediate care if you experience these symptoms.
Precautions
Follow label instructions carefully. Don’t exceed recommended dosage or frequency. Avoid contact with eyes. If contact occurs, rinse thoroughly with water. Don’t apply to broken or irritated skin. This may increase irritation. Wash hands thoroughly after application. This prevents accidental ingestion or spread. Keep out of reach of children. Accidental ingestion can be dangerous. Consult a healthcare professional before use if you are pregnant, breastfeeding, or have other medical conditions. Permethrin’s safety during pregnancy or breastfeeding is not fully established. Use caution with pets. Permethrin is toxic to cats and some other pets. Keep it away from them. In case of accidental exposure to your pet, contact a veterinarian immediately.
When to Seek Medical Attention
Contact your doctor if you experience persistent or worsening skin irritation, unusual symptoms, or a severe allergic reaction.
