GLP-1 Side Effects: What Is Normal, What Helps, When to Call the Doctor
Most side effects are early, digestive and manageable — if you know the playbook.
GLP-1 medicines (semaglutide in WegoSlim, tirzepatide in MounjaSlim) slow the stomach and quiet appetite — that is how they work, and it is also why the side effects are mostly digestive. The honest news: most are mild, front-loaded into the first weeks and dose-change periods, and respond well to simple adjustments.
The common ones — and the fixes that work
- Nausea (most common): eat smaller meals slowly, stop at "satisfied", avoid greasy/heavy food, keep ginger or crackers handy
- Constipation: water 2–3L, fibre, movement; a gentle laxative if the doctor approves
- Reflux/burping: smaller dinners, avoid lying down within 2–3 hours of eating
- Fatigue in early weeks: usually from eating too little — prioritise protein
- Injection-site redness: rotate sites; it fades in days
Why side effects cluster around dose changes
The medicine level in your body steps up with each dose tier, and your gut needs 1–2 weeks to adapt to each step. This is why programs titrate slowly and why "pushing through" a hard dose is the wrong move — telling your doctor and holding a comfortable dose longer often achieves the same weight outcome with far less misery.
Eating well when appetite is quiet
Small appetite makes it easy to under-eat protein — which costs you muscle, not just fat. Aim for protein at every meal (roughly a palm-size portion), hydrate consistently, and treat vegetables and fruit as non-negotiable. Alcohol hits harder on a slower stomach; keep it minimal.
Red flags — contact the clinic promptly
- Severe or persistent abdominal pain, especially radiating to the back (pancreatitis must be ruled out)
- Vomiting that prevents keeping fluids down for 24+ hours
- Right-upper-belly pain or yellowing (gallbladder issues)
- Signs of significant dehydration: dizziness, minimal urination
- Rapid heartbeat, severe allergic reaction, or anything that frightens you — call, that is what we are here for
The short version
- Most effects are digestive, early, and fade as your body adapts to each dose.
- Slow titration + small protein-first meals prevent most problems.
- Severe abdominal pain or persistent vomiting = contact the clinic immediately.
Frequently asked questions
How long does nausea last?+
Usually days to two weeks after starting or increasing a dose, then it settles. If it persists or disrupts eating, the doctor can slow the titration or add an anti-nausea aid.
Can I drink alcohol during the program?+
Small amounts occasionally are usually acceptable, but effects hit harder and it works against weight goals. Discuss your pattern honestly at follow-up.
Why am I losing hair?+
Rapid weight loss itself (from any method) can cause temporary shedding around months 3–4. Adequate protein and micronutrients help; it typically regrows as weight stabilises.
Do side effects mean the medicine is working?+
No — effectiveness is measured by appetite change and weight trend, not by how sick you feel. Zero side effects with steady loss is the ideal outcome.
What if I miss a weekly dose?+
If within a couple of days, inject when remembered and continue the schedule; if close to the next dose, skip — never double up. Confirm specifics with your program doctor.
