Dose range: 100 to 450 mg/day. IV route: three doses of 5 mg Metoprolol administered at intervals of 2 minutes time. Oral route: if the patient gives no sign of complication from the IV route, a total of 15 mg, then a tablet of 50 mg in 6 hour block should start immediately after the IV dose.
â¢ ANTIHISTAMINE (noun) The noun ANTIHISTAMINE has 1 sense: 1. a medicine used to treat allergies and hypersensitive reactions and colds; works by counteracting the effects of histamine on a receptor site. Familiarity information: ANTIHISTAMINE used as a noun is very rare.
Antihistamines are a type of medicine that's often used to treat a number of allergic health conditions. Although antihistamines can't cure these conditions, they often provide relief from symptoms. For example, antihistamines may be used to treat: hay fever. allergic rhinitis â inflammation of the nose due to an allergic reaction to substances such as dust mites.