Can You Take Co-Codamol with Mounjaro?

Co-codamol is a combination of paracetamol and codeine, both taken orally. Because Mounjaro acts on GLP-1 and GIP receptors to slow the rate at which the stomach empties its contents into the small intestine, there is a theoretical consideration that the absorption timing of oral medicines — including pain relief — may be altered. This does not automatically mean the medicines are unsafe to take together, but it is something your prescriber or pharmacist should be aware of when reviewing what you take.

What slower gastric emptying can mean in practice

For most oral medicines, slower gastric emptying means the active ingredients may take longer to reach peak levels in the bloodstream. For a short-term painkiller like co-codamol, many people would not notice a meaningful difference, but if you find the medicine seems less effective or takes longer to work than expected, that is worth logging and discussing with your healthcare professional.

Codeine and gastrointestinal effects

Codeine is known to slow gut motility, and Mounjaro already has gastrointestinal effects including nausea and constipation that are commonly reported, particularly early in treatment or after a dose increase. Combining the two could, in some people, increase the likelihood of digestive discomfort or constipation. Again, your prescriber or pharmacist is the right person to advise on this given your individual history.

If you are curious about how other substances interact with Mounjaro, you may find it useful to read about taking omeprazole alongside Mounjaro, using antibiotics while on Mounjaro, or apple cider vinegar and Mounjaro. For a broader look at how tirzepatide works in the body, see our guide on how Mounjaro works.

According to information on the electronic Medicines Compendium, the potential for tirzepatide to slow gastric emptying and its possible effects on oral medicines is noted in the product information — it is worth discussing with your prescriber if you take any regular oral medication. (electronic Medicines Compendium)

If you do take co-codamol while on Mounjaro — for example, for occasional pain relief as directed — keeping a clear record of how you feel is one of the most practical things you can do. GLP Trackr's side-effect tracking feature lets you log symptoms such as nausea, constipation, dizziness, or digestive discomfort, noting when they occurred and how severe they were. Over time, this builds a personal picture of patterns that is genuinely useful to bring to a prescriber appointment.

Alongside side-effect logging, the daily check-in in GLP Trackr captures mood, energy, and general wellbeing — so if you notice you feel different on days when you have taken additional medication, that context is already recorded and easy to share.

If any symptoms feel severe, persistent, or unusual, contact your healthcare professional promptly rather than waiting. GLP Trackr is a companion for recording and reflecting on your journey — it is not a substitute for clinical advice, and any decision about your medications should always involve your prescriber or pharmacist.

Ready to keep a clearer record of your Mounjaro journey? Download GLP Trackr on the App Store or Google Play and start a free 7-day trial — log symptoms, check-ins, and more, all in one place.