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A comparison of high- and low-dose lorazepam with amylobarbitone in patients with anxiety states.

A double-blind crossover trial comparing lorazepam at two dosage levels with amylobarbitone supported previous reports of the effective anxiolytic action of the drug. Evaluation of the patients' responses during each week of treatment was based on a physician's weekly rating and on daily self-rating by patients. The results were analyzed by sequential and nonsequential analyses. The main side effect of the drug was drowsiness, which occurred to a clinically significant degree among the high-dose group of patients. The authors emphasize the value of two dosage trials, particularly in devising subsequent flexible individual treatment regimens.