Co-codamol is available in 2 forms Paracetamol 500mgs codeine 8mgs and Paracetamol 500mgs codeine 30mgs. Unfortunately most studies suggest that at best both are only 5% more efficaceous as an analgesic than paracetamol alone, however side effects are increased depending on how much codiene is present. These include headche, abdominal pain, constipation and the most incidious of all, addiction!
Patients who have been taking codiene based analgesics for any period of time feel worse without them and feel that other, non-codiene drugs are less effective. This is in fact due to the feelings of unwellness they get as withdrawal syptoms from the codiene, rather than a lack of potency of the alternative drug.