Injectable codeine is available for subcutaneous or intramuscular injection only; intravenous injection is contraindicated, as this may result in nonimmune mast-mobile degranulation and resulting anaphylactoid response. Codeine suppositories may also be marketed in certain international locations. Codeine can be an opiate and an agonist on the mu opioid receptor (MOR). https://www.codeingil.com/