It\’s pointless redosing codeine, it inhibits the enzyme that converts it to morphine. You will just get more nausea and a greater histamine … Re—dosing has never worked for me. With DHC I would re—dose or use in consecutive days but with codeine I always try to wait at least ten to … There is substantial evidence of harm from abuse or misuse of codeine-containing medicines, including liver damage, gastrointestinal … 2024