Can I take Co-codamol and Omeprazole together?

Why this happens

These two medications are processed by different pathways in the body. Omeprazole works on the acid-producing pumps in the stomach, while co-codamol (a mix of paracetamol and codeine) works on pain receptors and the central nervous system. They do not significantly interfere with each other's absorption or metabolism.

It is safe to take these two medications together. If you find that the codeine in the co-codamol causes constipation, ensure you drink plenty of water and eat high-fibre foods. If you have any concerns about your stomach health or persistent pain, speak with your pharmacist or GP.

Paracetamol overdose

Co-codamol contains paracetamol. Do not take it with any other paracetamol-containing products (such as cold and flu remedies), as this can lead to fatal liver damage.

Opioid addiction and withdrawal

Co-codamol contains codeine, which can cause addiction if used for more than 3 days. Stopping suddenly after long-term use can cause withdrawal symptoms.

Breathing difficulties

Do not take co-codamol if you have severe asthma or breathing problems, as the codeine can dangerously slow your breathing.

Severe diarrhoea

Omeprazole can increase the risk of serious stomach infections (like C. difficile). Contact your doctor immediately if you develop severe or persistent watery diarrhoea.

Lupus-like skin reactions - omeprazole

Seek medical advice if you develop a skin rash, especially in areas exposed to the sun, as this may be a sign of subacute cutaneous lupus erythematosus (SCLE).

Alcohol

You must avoid drinking alcohol while taking co-codamol. Combining alcohol with codeine increases the risk of serious side effects, such as extreme sleepiness, breathing difficulties, and loss of consciousness. Additionally, both alcohol and paracetamol can affect the liver; combining them regularly increases the risk of liver damage.

It is best to avoid or strictly limit alcohol while taking omeprazole. Alcohol can increase the amount of acid your stomach produces, which may worsen your symptoms or make the medicine less effective. Additionally, both alcohol and omeprazole can irritate the stomach lining.

Grapefruit juice

Grapefruit juice can interfere with how your body processes codeine, potentially making the medicine less effective or increasing the risk of side effects. It is best to avoid grapefruit juice while taking this medicine.

Caffeine

Some versions of co-codamol already contain caffeine. If you consume extra caffeine from coffee, tea, or energy drinks, it may make you feel shaky, anxious, or cause a racing heart.

Taking multiple medicines? Our Medicines Interaction Checker helps you check whether your prescriptions, over-the-counter medicines, and supplements are safe to take together. Simply search for your medicines to see potential interactions and what to do about them.

Disclaimer

This information is for general educational purposes only and should not be relied upon as a substitute for professional medical advice. Always consult your GP, pharmacist, or another qualified healthcare professional before making decisions about your medications. Individual circumstances may vary, and only a healthcare professional who knows your medical history can provide personalised guidance.