Co-codamol: uses, side effects and practical questions

What is in co-codamol?

Co-codamol combines two painkillers: codeine and paracetamol. It may be used when simpler pain relief has not been enough. The combination matters because both ingredients must be considered when checking other medicines and the prescribed amount.

It is different from codeine alone, paracetamol alone and painkillers containing other combinations. If you are unsure what you have, read the active ingredient list or ask a pharmacist rather than identifying it only by the brand or colour of the box.

What a label such as 30/500 means

A 30/500 tablet contains 30 mg of codeine phosphate and 500 mg of paracetamol. These are amounts per tablet; the numbers do not tell you how many tablets to take or how often. The instructions must come from the prescription and the exact product.

Co-codamol exists in different strengths. The higher strengths are prescription-only, while the lowest strength can be supplied by pharmacies in appropriate circumstances. Do not substitute strengths or copy another person’s directions.

Avoiding duplicate ingredients

Check before adding another painkiller, cold-and-flu product or headache remedy. Some contain paracetamol, codeine or both, even when the product names look unrelated. Duplicate ingredients can cause an overdose.

A practical way to prepare for an interaction check is to keep the boxes or clear ingredient lists available. Include occasional remedies as well as daily prescriptions. Do not assume that a product bought without a prescription is safe to add.

Side effects, sedation and interactions

Constipation, nausea and sleepiness are common possible effects. Other sedating medicines and alcohol can increase risk from the codeine component. A pharmacist can check the full combination and advise about troublesome adverse effects.

Describe whether pain relief is helping you function and whether unwanted effects prevent that benefit. Avoid driving or hazardous tasks while impaired. The leaflet for your exact product lists further effects and circumstances requiring prompt advice.

Duration, dependence and stopping

Codeine can cause dependence, withdrawal and addiction. Ask how long co-codamol is intended for and when it should be reviewed. Products supplied by a pharmacy and products prescribed for a particular condition may have different directions.

If you have used it regularly beyond the original plan or need more to obtain the same effect, ask for support. Do not increase the amount or abruptly stop ongoing treatment without advice. The next step should consider the pain as well as the medicine.

Overdose concerns and review questions

Too much paracetamol can cause serious harm even when early symptoms are absent. Seek urgent medical advice immediately after a suspected overdose, even if you feel well. Do not wait for a routine enquiry response.

• What strength and formulation have I been prescribed?
• Are paracetamol or codeine duplicated in my other products?
• What should I do if the pain or adverse effects are not manageable?
• How long is treatment intended for and how should it be reviewed?

Bring the original packaging and describe the actual products and amounts taken when seeking urgent advice. A general article cannot assess an overdose.