ninety-eight healthy subjects completed a double-blind , placebo-controlled , multiple-dose cross-over study to compare the incidence of gastrointestinal side effects of doryx ( parke-davis , morris plains , nj ) capsules ( enteric-coated doxycycline hyclate pellets ) and vibramycin ( pfizer , new york , ny ) capsules ( doxycycline hyclate powder ) .
C0720025
doryx
C0058731
doxycycline hyclate