Apr 12, - You might have an Ativan (lorazepam) prescription, misjudge the effect of it to snort or inject intravenously, or simply taking more than prescribed. However, some people may buy Ativan or a generic form on the black Missing: recreational. Mar 17, - Lorazepam (Ativan) is used for treating anxiety, insomnia, epilepsy and irritable In injection form, lorazepam injection is used in emergency situations . Lorazepam oral tablets are available in strengths of mg, 1 mg, and 2 mg. it for recreational purposes or to continue using it against medical advice. Lorazepam, sold under the brand name Ativan among others, is a benzodiazepine medication. When given by injection onset of effects is between one and thirty minutes . a problem, the initial total daily lorazepam dose should not exceed 2 mg. .. Lorazepam is also used for other purposes, such as recreational use.