“The coadministration of quinidine resulted in a doubling of the area under the plasma concentration—time curve of (±)‐propranolol (530 ± 99 versus 1051 ± 138 ng · hr/ml; p < 0.05) and a reduction in the clearance of (±)‐propranolol from 3087 ± 648 to 1378 ± 173 ml/min (p < 0.05).”