Co-Codamol 8/500mg Tablets Co-Codamol 8/500mg Tablets are for the short term treatment of acute moderate pain when other pain killers have not worked. They can be used to relieve pain caused by headache, toothache, period pain & arthritic & rheumatic pain. You should only take this product for a maximum of three days at a time. If you need to take it for longer than three days you should see your pharmacist or doctor for advice.