Consumer information about the medication LORAZEPAM - SUBLINGUAL , includes side effects, drug interactions, recommended dosages, and storage information. Read more about the prescription drug LORAZEPAM - SUBLINGUAL. Does anyone have experience with taking Ativan (lorazepam)? I was given the medication for insomnia and was asked to take 0.5-1mg, but it didn't seem to work too well. C 15 H 10 Cl 2 N 2 O 2 MW: 321.16. It is a nearly white powder almost insoluble in water. Each Ativan (lorazepam) tablet, to be taken orally, contains 0.5 mg, 1 mg, or 2 mg of lorazepam. Lorazepam is an inexpensive drug used to treat anxiety. This drug is slightly more popular than comparable drugs. It is available in both brand and generic forms. It is a nearly white powder almost insoluble in water. Each Lorazepam tablet USP, to be taken orally, contains 0.5 mg, 1 mg, or 2 mg of Lorazepam USP. Lorazepam (Ativan) is a potent anti-anxiety medication with a high potential for abuse. Abusing this drug may lead to addiction that requires an individualized treatment program. Lorazepam, sold under the brand name Ativan among others, is a benzodiazepine medication. It is used to treat anxiety disorders, trouble sleeping, active seizures including status epilepticus, alcohol withdrawal, and chemotherapy-induced nausea and vomiting. It is also used during surgery to interfere with memory formation and to sedate those. How to use Ativan. Read the Medication Guide provided by your pharmacist before you start taking lorazepam and each time you get a refill. If you have any questions, ask your doctor or pharmacist. Lorazepam comes as a tablet and concentrate (liquid) to take by mouth. It usually is taken two or three times a day and may be taken with or without food. Lorazepam has a calming effect. It is prescribed for several different conditions. Your course of treatment will be as short as possible. This can range from one single dose, to up to a maximum of four weeks of treatment.