clemastine (meclastine) antihistamine drug molecule. used to treat allergy and itching. 3d rendering. atoms are represented as

clemastine meclastin clemastin meclastine antihistamine anticholinergic sedating antipruritic allergy pruritus itching itch rhinitis histamine sedation otc disease drug therapy medicine medicinal pharmacology pharmacy pharmaceutical pharma treatment molecule atoms chemical chemistry composition atomic model molecular 3d rendering illustration