Can You Take Mounjaro If You Have No Gallbladder?

Mounjaro (tirzepatide) is a dual GIP and GLP-1 receptor agonist, prescribed once weekly by injection. One of its effects is slowing gastric emptying — the rate at which food moves through the stomach and digestive tract. This change in digestive rhythm can affect how bile is released and processed.

In people who still have a gallbladder, GLP-1 receptor agonists have been associated with an increased likelihood of developing gallstones or gallbladder inflammation in some cases. If you are researching this area, the page on taking Mounjaro if you have gallstones covers that territory in more detail.

For people who no longer have a gallbladder, the picture is different but not straightforwardly simpler. Without a gallbladder to store bile, the liver releases it continuously and directly into the small intestine. This changes how the digestive system handles fats, and some people without a gallbladder experience ongoing symptoms such as loose stools or digestive discomfort — symptoms that can overlap with the commonly reported gastrointestinal side effects of Mounjaro itself (nausea, diarrhoea, loose stools, indigestion).

There is also a closely related question about having Mounjaro with no gallbladder that explores the practical experience side further. Additionally, if you take thyroxine following thyroid surgery or for a thyroid condition, it is worth reading about taking Mounjaro alongside thyroxine, since thyroid history is another factor prescribers consider.

What this means in practice

There is no blanket answer that applies to everyone. Some people without a gallbladder are prescribed Mounjaro without complications; others may find that overlapping digestive effects need careful monitoring. According to the electronic Medicines Compendium (eMC) product information for Mounjaro, gallbladder-related effects are listed among adverse reactions to be aware of — and your prescriber will weigh this against your personal history when making any prescribing decision.

If you are concerned about whether your post-cholecystectomy history affects your suitability, raise it directly with your prescriber or doctor. They are best placed to assess the benefit-risk balance for you specifically. The same applies if you have been asking about Mounjaro with no thyroid — thyroid history (including previous thyroid cancer or thyroid disease) is a separate but equally important conversation to have with your prescriber before starting treatment, as certain thyroid conditions appear in the precautionary information for tirzepatide.

If you have been prescribed Mounjaro and have had your gallbladder removed, keeping a clear record of how you feel after each dose is particularly valuable — both for your own awareness and for conversations with your prescriber.

GLP Trackr's side-effect tracker lets you log symptoms such as nausea, diarrhoea, indigestion, or abdominal discomfort after each injection, and see whether patterns emerge over time — for example, whether symptoms cluster in the days immediately after a dose. This kind of structured record is far more useful to bring to a prescriber appointment than trying to recall how you felt three weeks ago.

Alongside side-effect logging, the app's daily check-in captures energy, mood, and general wellbeing each morning, so you build a fuller picture of how your body is responding week by week. If your prescriber wants a summary of your experience, the doctor report feature compiles your logged data into a clear overview you can share directly.

For a broader understanding of how tirzepatide works in the body, the how Mounjaro works hub covers the mechanism, effects, and what to expect in more depth.

Important: if you experience severe or persistent abdominal pain — particularly pain that radiates to your back, or that comes with fever, vomiting, or jaundice — contact your healthcare professional promptly. These can be signs of a serious condition that requires urgent assessment and should not be logged and waited out. GLP Trackr helps you record what you are experiencing so you can discuss it with your prescriber; it is not a substitute for their clinical judgement.

Any suspected side effects can also be reported to your national reporting scheme — for example, the UK's Yellow Card scheme or the equivalent body in your country.

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 — no commitment needed.