After sublingual administration, peak plasma levels occur at 60 minutes. . Ativan Injection should not be used during pregnancy. low initial doses in these patients, depending on the response of the patient, in order to avoid over sedation or. Medscape - Anxiety, status epilepticus, sedation-specific dosing for Ativan, Lorazepam Intensol contraindications, pregnancy & lactation schedules, and cost information. mg/kg IM for 1 dose; 2 hours before surgery; not to exceed 4 mg (2 mg/dose in elderly), OR . 2, This drug is available at a middle level co-pay. Drug information on Ativan (lorazepam (injection)), includes drug pictures, side How is lorazepam injection given (Ativan)?; What happens if I miss a dose (Ativan)? in an unborn baby, and generally should not be used during pregnancy. Your breathing, blood pressure, oxygen levels, and other vital signs will be.