Antihistamines Allergy Medicines are the frequently uses in allergy
Antihistamines Allergy Medicines
Histamine is a biologically active substance that enhances inflammatory and immune responses of the body. It also has physiological function in the gut. Histamine also acts as neurotransmitter. Drugs which that antagonize these effects of histamines are called antihistamines.
Classification of Antihistamines
H1 antihistamines: mostly used to treat allergic disorders and mast cell-mediated disorders.
H2 antihistamines: indicated primarily for gastric reflux disease
First generation or sedative antihistamines: Have a central effect. They can cause sedatives.
Second generation or less sedative antihistamines
Uses of antihistamines:
Side effects of antihistamines
Side effect are more common with first generation antihistamines.
indicated primarily for gastric reflux disease because they reduce the production of stomach acid.