Antihistamines

There are a range of antihistamines available both on prescription and to buy over the counter. Some have a sedative effect and these are usually best avoided during the day as they can cause drowsiness. Some do not have a sedative effect and are better for use during the day. However, there is mixed feedback as to the effectiveness of non-sedative antihistamines.

Antihistamines come in different guises but the most commonly used for allergies are either tablets or a syrup.

One of the side effects of some allergies is a lack of sleep due to the constant itchiness etc. Antihistamines with a sedating effect are best taken about an hour before going to bed and can help sufferers to sleep.

Used for children, sedative antihistamines are often prescribed in high doses for short periods of time and are generally used to help get through flare ups.

Antihistamines are not addictive. One draw back is that people sometimes report they are not working as well as they did when first prescribed by the GP. Prolonged use of antihistamines can dilute the effectiveness as the body gets used to the dosage. It is advisable to stop taking them for a period of time and then restart.

Information written by the talkhealth medical panel

Last Reviewed: 13 October 2010
Next Review Date: 13 October 2012