Kanai R, Kinoshita S, Kanbe I, et al
You might be told to take a B12 injection
In the UK, the medicines regulator has seized hundreds of suspected fake Ozempic pens
If not treated, intestinal blockage could be fatal
This calculator does not provide medical advice or determine eligibility for medication

Key Takeaways: Tirzepatide Side Effects Most common side effects are gastrointestinal: nausea (40% to 45%), diarrhea (30% to 35%), constipation (20% to 25%) Side effects typically peak within days of dose increases, then improve over 2 to 3 weeks Tirzepatide causes slightly more GI side effects than semaglutide due to dual GLP-1/GIP action Starting at 2.5 mg and increasing gradually every 4 weeks minimizes side effect intensity Most effects are manageable with dietary adjustments, hydration, and timing strategies Serious side effects are rare but include pancreatitis, gallbladder issues, kidney problems Many people experience minimal side effects after the initial adjustment period Side effects improve significantly with each subsequent injection at the same dose Most Common Side Effects and Their Frequency Understanding what youre likely to encounter helps set realistic expectations and recognize that your experience is normal