Ativan warnings. Find patient medical information for Ativan Inj on WebMD including its uses, side effects and safety, interactions, pictures, warnings and user ratings. Learn about the prescription medication Ativan (Lorazepam), drug uses, dosage, side effects, drug interactions, warnings, reviews and patient labeling. This eMedTV article highlights several Ativan warnings and precautions to be aware of . Before using Ativan (lorazepam), you should be aware of the warnings and precautions ass... more