RESEARCH CHEMICALS USA FUNDAMENTALS EXPLAINED

Codeine and its salts are very well absorbed following the two oral and parenteral administration. Codeine is about ⅔ as helpful orally as parenterally. Codeine is metabolized mostly from the liver by enzymes of the endoplasmic reticulum, where it undergoes O-demethylation, N-demethylation, and partial conjugation with glucuronic acid.Promethazin