Pindolol, a beta adrenoceptor agent, is effective in the treatment of
hypertension in daily doses ranging from 10 to 45 mg. The drug shows p
H dependent solubility and a modified multi unit controlled release fo
rmulation was assessed for efficacy in vivo in healthy male human volu
nteers. An open blind comparative crossover study of the controlled re
lease formulation was carried out with a conventional formulation. The
treated quotients and the ratio between the maximal plasma concentrat
ion were calculated to assess the efficacy of the formulations.