Your questions answered

Why are prices increasing?

Eli Lilly has increased prices for all providers, which affects treatment costs. We’re working to keep pricing as competitive as possible ahead of changes from 1 September.

When do the new Mounjaro prices start?

We’re finalising our updated pricing. No changes apply before 31 August, subject to stock. We’ll publish updates once confirmed.

What if I can’t afford Mounjaro?

Some patients can remain on Mounjaro at a lower dose to reduce cost. Others may consider alternatives such as Wegovy or Saxenda. Trials suggest average weight loss of ~17% with Wegovy; individual results vary. Our clinical team can help you choose a suitable option.

Is Wegovy as effective as Mounjaro?

Both are effective. Trials suggest ~20% average weight loss with Mounjaro and ~17% with Wegovy. The best choice depends on tolerability, goals, and budget.

If I switch to Wegovy, will I get similar results?

Yes—Wegovy is a potent treatment. Pen dose numbers aren’t directly comparable across different medicines. What matters is the medicine, the right dose for that medicine, and consistency over time.

Can I switch directly from Mounjaro to Wegovy?

Yes. A 1-week (7-day) wash-out is typically advised before starting Wegovy. Your prescriber will confirm the timing that’s right for you.

Why is a wash-out needed?

To avoid overlapping effects and reduce the risk of side effects.

How long is the wash-out for each Mounjaro dose?

Generally 1 week (7 days) across dose levels.

Do I need a new consultation to switch?

Yes. Mounjaro (tirzepatide) and Wegovy (semaglutide) are different medicines, so a new consultation is required.

Can I switch back to Mounjaro later?

Yes. Follow the same 1-week wash-out and your prescriber’s guidance.

Can I switch mid-cycle?

Yes, but you must start the starter dose of the new medicine.

What if I start Wegovy too soon?

Overlapping effects can increase side-effect risk and make dose titration harder to interpret.

What if I delay starting Wegovy?

It’s safe to delay beyond one week, but appetite may increase and some weight regain can occur. Keeping healthy habits helps mitigate this.

Do I start Wegovy at the same strength as my Mounjaro dose?

No. Begin at 0.25 mg once weekly, regardless of your previous Mounjaro dose.

What is the Wegovy dose-escalation schedule?

0.25 mg weekly × 4 weeks → 0.5 mg × 4 → 1 mg × 4 → 1.7 mg × 4 → 2.4 mg maintenance. Some patients may remain longer at a given dose if effective and well-tolerated (at prescriber discretion).

How will I know if Wegovy is working?

Track hunger, satiety, and weight trends. Some patients see stronger effects at higher doses.

Will I regain weight during the wash-out?

Unlikely over one week, but appetite may rise temporarily until your Wegovy dose becomes effective.

Can I get support during the transition?

Yes—our pharmacists and dietitians are here to help throughout.

Are there symptoms to watch for?

Common GI effects (nausea, diarrhoea/constipation, abdominal discomfort) are similar with both. Stay well hydrated and contact us if symptoms are significant or persistent.

Anything to avoid while switching?

Maintain healthy routines, avoid known trigger foods, and continue regular activity as tolerated.

Can I switch if I had side effects on Mounjaro?

It depends on the side effects. Please speak to a clinician before switching.

Do I need a new prescription?

Yes—your prescriber must confirm suitability for Wegovy and issue a new prescription.

Is Wegovy safe long-term after Mounjaro?

Specific long-term data on switching are limited, but the overall risk profile is expected to be similar to starting Wegovy directly.

What if I miss my first Wegovy dose?

That’s okay. Start the 0.25 mg dose when ready, provided you’ve observed the 1-week wash-out. Longer delays may increase appetite temporarily.

Will switching affect future eligibility?

No. Eligibility is assessed case by case; switching itself doesn’t prevent future treatment.

This information is for existing patients and does not replace medical advice. Always follow your prescriber’s instructions.

Compare weight-management treatments

Key facts at a glance. Choose a treatment to start your consultation.

Feature Wegovy (Semaglutide)
Avg loss ~15%*
Mounjaro (Tirzepatide)
Avg loss ~20.9%*
Saxenda (Liraglutide)
Avg loss ~10%
CostFrom £118/monthFrom £149/ monthFrom £124/month
Licensed indicationWeight managementWeight managementWeight management
Dosage formPrefilled injectable penPrefilled injectable penPrefilled injectable pen
Dosing frequencyOnce weeklyOnce weeklyOnce daily
Starting dose0.25 mg2.5 mg0.6 mg
Maintenance dosesUp to 2.4 mgUp to 15 mgUp to 3.0 mg
Injection siteAbdomen, thigh, upper armAbdomen, thigh, upper armAbdomen, thigh, upper arm
Avg. weight loss*Up to 15%*Up to 20.9%*~10%
Suitable with oral contraception?YesNo
Injection site reactions†0.3% of patients8.6% of patients
Licensed for heart health‡YesNo
Proven in chronic kidney diseaseYesNo
Order Check Eligibility Check Eligibility Check Eligibility

* Effectiveness: In studies, the highest dose of Mounjaro led to an average weight loss of up to 20.9% in 36 weeks and 25.3% in 88 weeks (SURMOUNT-1 & SURMOUNT-2). Wegovy users lost around 15% in 68 weeks (STEP-1).
† Injection site reactions: 0.3% of Wegovy users, 8.6% of Mounjaro users.
‡ Heart health: Wegovy reduced risk of heart attack, stroke and CV death by up to 20% in patients with obesity and existing heart disease (SELECT trial, NEJM 2023).
§ Chronic kidney disease: Wegovy (semaglutide) slowed CKD progression in patients with T2D (FLOW trial, NEJM 2024).

Wegovy (Semaglutide) Avg loss ~15%*

Cost
From £118–£249 / month
Licensed indication
Weight management
Dosage form
Prefilled injectable pen
Dosing frequency
Once weekly
Starting dose
0.25 mg
Maintenance doses
Up to 2.4 mg
Injection site
Abdomen, thigh, upper arm
Suitable for oral contraception?
Yes
Injection site reactions†
0.3% of patients
Licensed for heart health‡
Yes
Proven in chronic kidney disease
Yes
Check Eligibility

Mounjaro (Tirzepatide) Avg loss ~20.9%*

Cost
From £171–£464 / month
Licensed indication
Weight management
Dosage form
Prefilled injectable pen
Dosing frequency
Once weekly
Starting dose
2.5 mg
Maintenance doses
Up to 15 mg
Injection site
Abdomen, thigh, upper arm
Suitable for oral contraception?
No
Injection site reactions†
8.6% of patients
Licensed for heart health‡
No
Proven in chronic kidney disease
No
Check Eligibility

Saxenda (Liraglutide) Avg loss ~10%

Cost
From £69 / month
Licensed indication
Weight management
Dosage form
Prefilled injectable pen
Dosing frequency
Once daily
Starting dose
0.6 mg
Maintenance doses
Up to 3.0 mg
Injection site
Abdomen, thigh, upper arm
Suitable for oral contraception?
Yes
Injection site reactions†
Data not available
Licensed for heart health‡
No
Proven in chronic kidney disease
No
Check Eligibility

* Effectiveness: Mounjaro – SURMOUNT-1 & SURMOUNT-2 trials (20.9% at 36 weeks; 25.3% at 88 weeks). Wegovy – STEP-1 trial (~15% at 68 weeks).

† Injection site reactions: Wegovy (0.3%), Mounjaro (8.6%).

‡ Heart health: SELECT outcomes trial (NEJM 2023) – Wegovy reduced CV events by ~20%.

§ CKD: FLOW trial (NEJM 2024) – Wegovy slowed CKD progression in T2D patients.