Injectable codeine is obtainable for subcutaneous or intramuscular injection only; intravenous injection is contraindicated, as this may lead to nonimmune mast-cell degranulation and resulting anaphylactoid reaction. Codeine suppositories are marketed in some nations around the world. Codeine is undoubtedly an opiate and an agonist from the mu opioid receptor (MOR). https://www.codeingil.com/