Allergy

Antihistamines ease sneezing, a runny nose, itchy eyes and itchy rashes. Non-drowsy options suit daytime use. Older antihistamines such as chlorphenamine and promethazine can make you sleepy, so don't drive or drink alcohol if they affect you.

For hay fever, starting treatment before your symptoms usually begin can help. Call 999 straight away if someone has swelling of the lips, tongue or throat, or difficulty breathing.