We will do our best to update the site if we are made aware of any malfunctioning or misapplication of these algorithms.We cannot guarantee results and occasional interruptions in updating may occur.(There are other types of antihistamines that affect H-2, H-3, and H-4 receptors.) People build up tolerance to them over time and when they stop taking them experience rebound insomnia.Also called histamine antagonists, antihistamines are administered to fight allergic reactions, in which cases sleepiness is considered a possibly undesirable side effect.Usage of the website does not substitute professional medical advice.The side effects featured here are based on those most frequently appearing in user posts on the Internet.Topical preparations (ointments and creams) are often applied to insect bites but are not very effective as the antihistamine chemical does not penetrate the skin well.Sedating antihistamines should not be used in children under the age of 2 years for any reason and should not be used in children under 6 years for cough and cold symptoms.
They increase tractability and compliance of children or troublesome or demanding patients.
For people who need to get to sleep, however, the drowsiness is the main benefit of antihistamines.
These are usually not prescription drugs and can be purchased at retailers over-the-counter.
At higher doses it may result in slurred speech, staggering gait, poor judgment, and slow, uncertain reflexes.
Doses of sedatives such as benzodiazepines, when used as a hypnotic to induce sleep, tend to be higher than amounts used to relieve anxiety, whereas only low doses are needed to provide a peaceful effect.