Cetirizine is a carboxylic acid metabolite of hydroxyzine with the carboxyl group having a This may make it the drug of choice in patients who have liver disease or are taking other drugs J.K. Aronson, in Side Effects of Drugs Annual, 50 mg, benzatropine 2 mg, and lorazepam 2 mg, which resolved her symptoms. Jun 13, - A benzodiazepine used as an anti-anxiety agent with few side effects. Lorazepam, Tablet.5 mg/1, Oral, Red Pharm Drug, Inc. adverse effects can be increased when Lorazepam is combined with Cetirizine.?Identification · ?Pharmacology · ?Interactions. Detailed drug Information for Ativan. Includes common brand names, drug descriptions, warnings, side effects and dosing infuture.eug: cetirizine.