The in vivo absorption and the in vitro dissolution characteristics of a commercial suspension, a commercial tablet, and an experimental tablet formulation of the analgesic‐antipyretic drug salicylamide were compared. The results of the study demonstrated that the absorption of this drug is dissolution rate‐dependent and that the initial in vitro dissolution rate in 0.1 N HCl correlates well with the initial absorption rates of the test dosage forms in human subjects. Copyright © 1969 Wiley‐Liss, Inc., A Wiley Company