Yes. If you're currently taking Mounjaro or another GLP-1 medication like Wegovy through a different provider, you can switch to Voy. Depending on your treatment history, you may be able to start at a higher dose so you can continue your progress without going back to the beginning. Your clinician will review your history and recommend the right dose for you.

You can cancel your plan at any time. If you're on a monthly plan, just cancel at least one day before your next order date.

If you're on a longer plan (3, 6, or 12 months), you can cancel without any fee during your final month. If you'd like to cancel earlier, an early cancellation fee may apply to reflect the discount you received on your plan. Our team will explain the details and confirm any costs before processing.

Want to change your dose or plan length instead? You can do this through the Voy app or by contacting our support team.

Everything you need to start and stay on track. Your plan includes one Mounjaro pen every month containing 4 doses, 4 disposable needles, a sharps bin, a plan information leaflet, and free next-day delivery. Your first order also includes a rescue pack with medication for sickness and diarrhoea, ready if you need it.

You'll also get full access to the Voy app for tracking your weight, injection reminders, dose management, tips from our experts, and a community of members on the same journey. Clinical support is included too. Call our hotline Mon–Fri 9–5 or use live chat 7 days a week.

Mounjaro (tirzepatide) has demonstrated a strong safety profile through extensive clinical trials and regulatory review. The medication has received approval from major health authorities, including the UK's MHRA, for weight management.

The most common side effects are mild to moderate stomach issues like nausea, loose stools or constipation. These happen mainly when increasing your dose, but should disappear on their own. Read more on this here.

Before using Mounjaro, it's important to be aware of potential side effects. These are usually mild and occur when starting the medication or increasing your dose, as your body adjusts to the treatment. Side effects typically clear up on their own.

The most common side effects of Mounjaro include:

• Loss of appetite
• Nausea and vomiting
• Diarrhoea or constipation
• Headaches or dizziness
• Abdominal pain
• Fatigue
• Burping and flatulence
• Irritation, itching or bruising around where you have injected the medication

If you need support managing side effects, call our support line on 020 3912 9885 and press 2 to speak to a prescriber within minutes (available Monday to Friday, 9 AM - 5 PM).

Mounjaro starts working within a few hours of your first injection, but it takes time for you to notice the effects.

In the first few weeks on the starting dose (2.5mg), some people notice reduced appetite or fewer cravings, while others don't feel much yet. This is normal. As your dose increases over the following weeks, appetite suppression becomes more noticeable and weight loss starts to accelerate.

Your Voy clinical team will work with you to find the right dose and pace for your individual needs.

Mounjaro can improve fertility, particularly in women with PCOS. Weight loss and improved insulin sensitivity can help regulate menstrual cycles and increase the chances of ovulation, which may make it easier to conceive.

However, Mounjaro is not safe to take during pregnancy or while trying to conceive. You should stop taking Mounjaro at least one month before trying to get pregnant.

Mounjaro can make oral contraceptive pills less effective, so you may need to use additional contraception. Speak to your clinician for advice.

Jastreboff, Ania M., et al. "Tirzepatide Once Weekly for the Treatment of Obesity." The New England Journal of Medicine, vol. 387, no. 3, 21 Jul. 2022, pp. 205-216, https://doi.org/10.1056/NEJMoa2206038.

"Mounjaro KwikPen 10mg Solution for Injection in Pre-Filled Pen." Electronic Medicines Compendium, Eli Lilly and Company Limited, www.medicines.org.uk/emc/product/15484/smpc. Accessed 17 Apr. 2026.

"Mounjaro KwikPen 10mg Solution for Injection in Pre-Filled Pen." Electronic Medicines Compendium, Eli Lilly and Company Limited, www.medicines.org.uk/emc/product/15484/smpc. Accessed 17 Apr. 2026.