“… quinidine , two P-… both ofloxacin isomers (with concomitant verapamil, intestinal clearances were 0.12 +/- 0.02 versus 0.18 +/- 0.03 ml/min for S-(-)- and R-(+)-… 0.18 +/- 0.01 versus 0.23 +/- 0.01 ml/min without modifying their areas under the concentration-time curve in serum.”