Disclaimer: This article is for general information only and isn’t medical advice. Always speak to your prescribing professional or GP if you’re unsure about symptoms or side effects.

If you’re on Mounjaro, Ozempic, or Wegovy, chances are you’ve spent at least one anxious moment wondering:

You’re not alone.

These medications work in powerful ways, and they can cause side effects, some you might expect, and others that catch you off guard.

But not every burp, cramp, or wave of nausea means something is wrong.

The trick is knowing what’s normal, what’s worth watching, and what means you should call your prescriber.

Let’s break it down so you can feel more in control.

What’s Totally Normal

Let’s start with the good news: these side effects are very common.

They tend to be mild to moderate and often improve as your body adjusts.

If you’re experiencing these, it doesn’t mean you’re doing anything wrong:

• Nausea, especially after large or rich meals

• Occasional vomiting (usually if ignoring "stop eating" cues)

• Mild constipation or looser stools

• Burping and bloating (including sulphur burps)

• Heartburn or mild stomach discomfort

• Reduced appetite or food aversions (including the “ick” with certain smells)

• Mild fatigue or feeling a bit more tired than usual

• Light dizziness, especially if standing quickly

• Slight redness or itch at the injection site

These effects often show up in the first few weeks or after a dose increase. They are your body adjusting to slower digestion and changed appetite signals.