Page 1. 343 ... 112.64. 120.99, 125.86. Arch. P hm Pharm. Med. ... After 1, 2, 3, and 4 min aliquots of the incubation mixture were transferred to tubes containing an equal volume of ice cold stop solution (RPMI1640 medium containing verapamil at a final concentration of 10 kg/ml). ...