Ativan 2 mg tablet (Lorazepam drug) belongs to a group of medicines called Benzodiazepines. 2 mg of Lorazepam is used to treat anxiety attacks and sleeping problems like insomnia that are related to anxiety and depression. The white MYLAN 457 pill is known as a ‘Pre-med’, because it help to provide relaxation before any operation or surgery. Points To Take Ativan (MYLAN 457 pill) With Care: As wit