The objective of this study was to compare the rate of absorption and the oral bioavailability of a test formulation of doxycycline monohydrate 1 x 25 mg (5mL) oral suspension manufactured by IVAX Pharmaceuticals, Inc. and distributed by TEVA Pharmaceuticals USA to an equivalent oral dose of the commercially available reference product, Vibramycin Monohydrate® manufactured by Pfizer, Inc. Following an overnight fast of at least 10 hours, subjects consumed a standard high-calorie. high-fat breakfast meal. This standard breakfast meal began 30 minutes prior to each dose.