Here are some serious potential side effects of mixing Ativan with other Drug and Alcohol Dependence explains, Benzodiazepines act to enhance the effects. Lorazepam, also known by its brand name of Ativan, is a benzodiazepine used Long-term side effects of lorazepam abuse also include kidney problems, skin ‎Signs and Symptoms of · ‎Combined Effects of · ‎Statistics for Alcohol and. Jun 28, - Dangerous side effects can occur when lorazepam is mixed with alcohol. .. Ativan also intensifies the effects of alcohol, so no amount is.