Codeine Phosphate 30mg Tablets are a prescription-only medicine used to relieve moderate to severe pain when standard painkillers such as paracetamol, ibuprofen, or aspirin are not effective on their own. It belongs to a group of medicines known as opioid analgesics, which work by blocking pain signals in the brain and nervous system. https://www.diigo.com/item/note/b9tut/v3gw?k=ebf50f4cc0543269a62d58611962f6a5