Co-codamol 30/500mg Online: A Safe and Responsible UK Guide Co-codamol 30/500mg is a prescription painkiller used to treat moderate pain when other pain-relief medicines have not provided enough benefit. It contains two active ingredients: codeine phosphate 30mg and paracetamol 500mg. Because codeine is an opioid medicine, this strength of co-codamol requires particular care and should only be...