Benzalkonium chloride is an antiseptic that disrupts the outer membrane of bacteria. It is used to clean skin and minor wounds, and it is also the preservative that keeps many eye drops, nasal sprays and lotions sterile after opening.

What Benzalkonium Chloride Is Used For

Cleaning minor cuts, grazes and burns
Antiseptic solutions, wipes and hand products
Preservative in eye drops, nasal sprays and creams
Some throat lozenges and mouth preparations

Common Side Effects

Stinging on broken skin
Dryness or irritation with repeated use
Eye irritation with long term use of preserved drops

Precautions

Keep it out of the eyes unless it is part of a product made for them. If you use eye drops many times a day or for months, preservative free versions are gentler on the eye surface. Do not use antiseptic on deep, dirty or animal bite wounds without medical advice, and stop if a rash develops.

This page is general information only. It is not a substitute for advice from your doctor or pharmacist, and it does not include dosage. Always follow the directions given to you and read the leaflet inside the pack.