Mounjaro
Starting a new weight-loss injection like Mounjaro (tirzepatide) can feel exciting but also a bit daunting.
Many people ask: “What are the side effects of Mounjaro, and are they serious?”
At PPRX Online Pharmacy, our pharmacists regularly support patients through every stage of their Mounjaro journey.
Most side effects are mild, temporary, and easy to manage at home — and they usually improve within the first few weeks of treatment.
Common Mounjaro Side Effects
These are the most frequently reported effects and typically appear during the first month while your body adjusts.
| Side Effect | How Common? | What Helps |
|---|---|---|
| Nausea | Very common | Eat small meals, avoid greasy food, inject after food, stay hydrated. |
| Constipation | Common | Increase fibre, drink plenty of water, gentle activity helps. |
| Diarrhoea | Common | Eat bland foods, stay hydrated, avoid spicy meals. |
| Heartburn or burping | Common | Eat slowly, avoid fizzy drinks, smaller portions. |
| Fatigue | Occasional | Ensure adequate rest, balanced meals, and hydration. |
These symptoms usually ease as your body adapts to the dose.
Less Common or Rare Side Effects
- Abdominal pain or bloating
- Loss of appetite (mild, part of its mechanism)
- Injection site redness or itching (usually mild and short-lived)
- Mild dizziness from reduced calorie intake
Rare but serious side effects are extremely uncommon. Always contact your prescriber or seek urgent medical care if you experience:
- Persistent severe abdominal pain (could indicate pancreatitis)
- Signs of allergic reaction (rash, swelling, shortness of breath)
- Persistent vomiting or dehydration
Pharmacist Tips to Minimise Side Effects
- Inject on the same day each week to stabilise hormone levels.
- Avoid heavy, fatty meals after injection days.
- Eat slowly and stop as soon as you feel full.
- Sip water throughout the day to reduce nausea and constipation.
- Rest and recover if you feel light-headed — it often passes within a day.
- Gradually increase doses only as advised by your prescriber.
When to Contact a Pharmacist or Prescriber
If symptoms persist beyond a few weeks or significantly affect your daily life, contact your prescriber for a review.
Sometimes adjusting the injection day, timing, or dose can resolve the issue.
At PPRX, our pharmacists provide free support for every Mounjaro order — via email or WhatsApp — so you’re never left without advice.
Mounjaro Prices at PPRX (October 2025)
Each KwikPen includes four once-weekly doses — a full 4-week supply.
| Strength | Price |
|---|---|
| 2.5 mg | £199.99 |
| 5 mg | £219.99 |
| 7.5 mg | £299.99 |
| 10 mg | £319.99 |
| 12.5 mg | £334.99 |
| 15 mg | £349.99 |
All prices include your free consultation, private prescription, and next-day cold-chain delivery.
➡️ Buy Mounjaro UK – PPRX Online Pharmacy
➡️ Start Your Free Consultation
FAQs
Are side effects worse at higher doses?
Sometimes temporarily, but they usually fade as your body adjusts. Increasing slowly helps tolerance.
Can I take nausea medication with Mounjaro?
Yes — mild anti-sickness medicines can be used if approved by your prescriber.
What if I feel unwell after my injection?
Rest, stay hydrated, and eat light meals. If symptoms are severe or persistent, seek medical advice.
Do side effects mean it’s working?
Not necessarily, but many users notice appetite changes or mild nausea early on — a sign that Mounjaro is active in your system.
Pharmacist Review
This article was written and reviewed by a GPhC-registered pharmacist under MHRA and NICE guidance for tirzepatide use in the UK.
Start your order today at www.pprx.co.uk
At PPRX UK, we provide:
- Genuine Mounjaro pens, sourced directly from the manufacturer (Eli Lilly)
- Dispensing via a GPhC-registered UK pharmacy
- Professional consultations with UK pharmacists
- Ongoing support, dosage guidance, and repeat supply options
Whether you’re just starting or switching from Ozempic or Wegovy, we’re here to help.
📞 Get in Touch
Visit www.pprx.co.uk or contact us directly to begin your online consultation.
We offer fast, discreet UK-wide delivery and exceptional support throughout your journey.
Mounjaro is a prescription-only medicine. This article is for informational purposes only and does not replace medical advice. Always consult a qualified healthcare provider before starting treatment. nhs
