1 Valium and Xanax are both classified as benzodiazepines, or minor . the effects of 1 mg of Alprazolam (Xanax) to 1 mg of Diazepam (Valium), the Xanax will. Jun 3, - Unlike opioid equipotent dosing, benzodiazepine equivalence is much to describe equivalent dose or potency of benzodiazepines within the package insert. Midazolam, lorazepam, diazepam, and phenobarbital are available in a conversion of 1 mg IV lorazepam to 2 mg of IV midazolam, which is. Comparative dosages alprazolam, diazepam, lorazepam, oxazepam, temazepam, clonazepam, The usual dose is 3 mg twice or three times daily. In severe.