Apr 5, - The approximate equivalent dose of lorazepam to 10 mg diazepam: mg 1. Difference between Alprazolam and Lorazepam chart. The drug is times potent in comparison to Valium. The commonly used Lorazepam and Xanax both are particularly used for treating anxiety. The main. Feb 14, - Both Ativan and Valium, like other benzodiazepines, can cause drowsiness, loss of balance, sedation, and sleep disturbance. More rare but more serious side effects of both medications include respiratory depression and psychological depression -- People prescribed Ativan have even reported suicidal thoughts.