Feb 14, - Ativan and Valium are drugs that belong to a class of drugs called It is thought that lorazepam, diazepam, and other benzodiazepines like Xanax The usual oral pill diazepam dose for anxiety or seizures is 2 mg to 10 mg. Dec 19, - manufacturer. route. form. dosage. cost*. Xanax. Alprazolam. Pfizer . Diazepam (Valium®): The initial dose is 2 mg two to four times a day; the dose can be Lorazepam: Use an initial dose of 1 mg/day in divided doses, and. Apr 25, - Comparative dosages alprazolam, diazepam, lorazepam, oxazepam, temazepam, The usual dose is 3 mg twice or three times daily.