Hyperkalemia, verapamil, and dantrolene.
D003082:Colectomy; D003110:Colonic Neoplasms / Q000150:complications; D003327:Coronary Disease / Q000150:complications; D003620:Dantrolene / Q000009:adverse effects*; D004347:Drug Interactions; D006801:Humans; D006947:Hyperkalemia / Q000097:blood / Q000139:chemically induced*; D008297:Male; D008305:Malignant Hyperthermia / Q000150:complications; D008875:Middle Aged; D011184:Postoperative Period; D014700:Verapamil / Q000009:adverse effects*
D014700:Verapamil; D003620:Dantrolene