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In the elderly, falls may occur as a result of benzodiazepines. Rebound effects often resemble the condition being treated but typically at a more intense level and may be difficult to diagnose. Blood or plasma lorazepam concentrations are usually in a range of 10-300 ug/L in persons either receiving the drug therapeutically or in those arrested for impaired driving, and 300-1000 ug/L in victims of acute overdosage. Ativan should never be shared with another person, especially someone who has a history of drug abuse or addiction. Be careful if you drive or do anything that requires you to be awake and alert. Lorazepam tablets of the Ativan brand also contain lactose, microcrystalline cellulose, polacrilin, magnesium stearate, and colouring agents (indigo carmine—E132—in blue tablets and tartrazine—E102— in yellow tablets). The likelihood of dependence is relatively high with lorazepam compared to other benzodiazepines. The concern is that, though relatively nontoxic in themselvesverification needed, benzodiazepines may inadvertently become facilitators of suicidal behaviour. edit PharmacokineticsLorazepam is highly protein bound and is extensively metabolised into pharmacologically inactive metabolites. For more information, contact the U.