Combination of sedating and non sedating antihistamines
First generation antihistamines are used less often to treat allergies because they cause significant sedation.
Antihistamines are divided into two categories, first generation or older agents and second generation or newer agents.
First generation antihistamines have many drawbacks including side effects of drowsiness and significant anticholinergic side effects that, for example, can cause difficulty urinating or constipation, and are therefore not used very often.
of antihistamines on signs and symptoms of the common cold. Background On average, young children have six to eight colds per year and adults have two to four.
Common cold symptoms include sore throat, nasal stuffiness and discharge, sneezing and cough.
(A second type of antihistamine is used primarily for suppressing acid production in the stomach and treating acid-related diseases such as ulcers of the stomach.