ten healthy male volunteers , aged 18-37 years , entered a balanced crossover comparison of the pharmacokinetic profiles of ( a ) one 240 mg verapamil hcl sustained-release tablet ( isoptin sr 240 , securon sr ) ( 1 x 240 mg ) and ( b ) either : two half 240-mg verapamil hcl sustained-release tablets ( 2 x half 240-mg tablets , study 1 ) or two 120-mg verapamil hcl sustained-release tablets ( isoptin sr 120 ) ( 2 x 120 mg , study 2 ) .
C0700468
verapamil hcl
C0721145
isoptin