Injectable codeine is obtainable for subcutaneous or intramuscular injection only; intravenous injection is contraindicated, as this may lead to nonimmune mast-cell degranulation and ensuing anaphylactoid reaction. Codeine suppositories are also promoted in some nations around the world. Codeine can be an opiate and an agonist on the mu opioid receptor https://codeingil.com/