The existence of the polymorphism in CYP2D6 brings about non-working enzyme variant and could be related to decreased drug mtabolism or minimized therapeutic reaction when treated with codeine. fentanyl transdermal and codeine both boost sedation. Stay away from or Use Alternate Drug. Restrict use to patients for whom choice https://codeine-phosphate-buy95173.mybjjblog.com/codeine-phosphate-buy-an-overview-43950585