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Jun 3, - Midazolam, lorazepam, diazepam, and phenobarbital are available in both A commonly cited double-blind trial suggests a conversion of 1 mg IV lorazepam to 2 mg of administration of continuous intravenous lorazepam or midazolam. Tintinalli's Emergency Medicine: A Comprehensive Study Guide. Aug 2, - The FDA started listing drugs by classification, or drug schedules, in Examples of Schedule IV substances include: alprazolam (Xanax), carisoprodol clorazepate (Tranxene), diazepam (Valium), lorazepam (Ativan). Dec 19, - Diazepam (Valium®): The initial dose is 2 mg two to four times a day; the dose Benzodiazepines are category D drugs, primarily due to concerns with Alprazolam: Changes in appetite (decrease or increase), weight gain.