Can You Take Pepto Bismol with Mounjaro or Wegovy?

Gastrointestinal side effects — including nausea, loose stools, and indigestion — are among the most commonly reported experiences for people starting or titrating Mounjaro or Wegovy. It is understandable to reach for an over-the-counter remedy when these symptoms appear.

Pepto Bismol contains bismuth subsalicylate, which is chemically related to aspirin (salicylate). This matters for a few reasons worth knowing about:

• Salicylate sensitivity: People who are sensitive to aspirin or salicylates should avoid bismuth subsalicylate products. If you are unsure whether this applies to you, ask your prescriber or pharmacist before taking it.
• Other medicines you may be taking: Bismuth subsalicylate can interact with certain medicines, including blood thinners and some medicines used to manage blood sugar. If you take any other prescribed medicines alongside Mounjaro or Wegovy, checking with your pharmacist is an important step.
• Delayed gastric emptying: GLP-1 and dual GIP/GLP-1 receptor agonists like tirzepatide commonly slow stomach emptying. This can affect how quickly any oral medicine is absorbed. Your prescriber or pharmacist is the right person to advise on the practical implications of this for any over-the-counter product you are considering.
• Symptom timing: GI symptoms on these medicines are often most noticeable in the days following a dose increase, and many people find they ease over time as the body adjusts.

For broader context on living with Mounjaro day to day — including travel and other practical considerations — see our guide on travelling with your Mounjaro pen, and the main Mounjaro overview for a wider look at the medicine.

If your nausea or gastrointestinal symptoms are severe, persistent, or feel unusual, contact your healthcare professional promptly rather than managing them independently. Symptoms such as severe abdominal pain radiating to the back should be assessed by a doctor without delay.

One of the most useful things you can do when GI symptoms appear is to log them consistently — noting when they happen, how intense they feel, and how long they last. Over time, patterns often emerge: symptoms linked to dose increases, certain foods, or time of day.

GLP Trackr's side-effect tracker lets you record symptoms like nausea, diarrhoea, and indigestion against your dose and daily log, so you can see those patterns clearly. When you next speak to your prescriber, you can bring a real picture of how you have been feeling rather than relying on memory — the app even generates a summary you can take to an appointment.

If you are also keeping an eye on which foods sit better with your stomach during this time, the food log (including a quick photo-scan option) makes it easy to spot whether certain meals coincide with worse days.

You may also find our page on Mounjaro and endometriosis relevant if you are managing multiple conditions alongside your treatment.

A note on safety: GLP Trackr helps you record what you experience so you can have better conversations with your prescriber — it is not a substitute for their advice, and no tracking app can replace clinical guidance on what remedies are right for you.

Log your symptoms, spot your patterns, and go into every appointment prepared. Download GLP Trackr on the App Store or Google Play and start a free 7-day trial.