Ativan is the brand name for Lorazepam. It belongs to a class of drugs known as benzodiazepines. It is said that Ativan works by enhancing the working of several neurotransmitters in the brain. It is used for treating anxiety; you can easily buy Ativan online. Ativan helps treat anxiety disorders, trouble sleeping, severe agitation, active seizure, alcohol withdrawal, etc. It can be taken orally or injected into a vein or a muscle, and the effect begins after 30 minutes of taking the drug and lasts up to a day.