Alcoholism, chronic obstructive pulmonary disease (COPD), CNS Ativan/Lorazepam Intravenous Inj Sol: 1mL, 2mg, 4mg . DOSING CONSIDERATIONS. For intravenous administration, Ativan Injection should always be diluted with function (e.g. chronic obstructive pulmonary disease [COPD]), because of the. Apr 25, - For the treatment of status epilepticus, the usual recommended dose of ATIVAN Injection is 4 mg given slowly (2 mg/min) for patients 18 years and older. If seizures cease, no additional ATIVAN Injection is required.