Lorazepam interacts with Anesthetics (parenteral-local), Antihypertensives with. CNS depressant effects, CNS depressants, Antacids Antihypertensives or Diuretics used as antihypertensives, Calcium Channel blocking agents, Carbamazepine, Haloperidol, lsoniazid, Levodopa, Rifampicin.