Phenergan

When a sedating antihistamine is used

Phenergan contains promethazine, an older, sedating antihistamine. Unlike non-drowsy antihistamines (such as cetirizine or fexofenadine) used for daytime hayfever, promethazine's drowsiness means it's sometimes chosen for different situations. Because it's sedating and not suitable for young children, it's important to understand how it differs from everyday allergy tablets before use.

Frequently Asked Questions

How is Phenergan different from non-drowsy antihistamines?

Promethazine is a sedating antihistamine, so it commonly causes drowsiness, whereas cetirizine, loratadine and fexofenadine are designed to be non-drowsy for daytime use.

Who should not use it?

It's not suitable for children under 6, and it interacts with alcohol and some medicines. Don't drive if affected, and ask our pharmacist before use.

When should I get advice?

Speak to your pharmacist before use if you take other medicines, have certain conditions, or are pregnant or breastfeeding.