Switching from Mounjaro to Wegovy: Pharmacy Policies

Thinking about switching from Mounjaro to Wegovy? You’ll find that not all pharmacies have the same policies. With the recent price rises of Mounjaro in the UK, many people are asking pharmacies about swapping to Wegovy. Pharmacies set their own rules, and policies often depend on pricing, supply, and internal procedures. This page explains how switching works across different companies.

It should be remembered that this is not medical advice. We do not encourage or endorse swapping medications. Always consult a qualified healthcare professional before making changes to your treatment.

Clinical trials show that Mounjaro is generally more effective than Wegovy for weight loss. Participants using Mounjaro achieved greater weight loss than those using Wegovy. Moreover, many users reported fewer side effects with Mounjaro compared to Wegovy. However, individual responses may vary.

Because of rising costs, some patients now consider Wegovy as a more affordable choice. As a result, pharmacies are seeing more switching requests. Some pharmacies require a new prescription. Others manage changes according to their own procedures.

Since policies differ and can change quickly, you should always check with your chosen pharmacy before making a decision.

Cautious Swapper Pharmacies

These pharmacies allow swapping to Wegovy, but only with stricter checks and requirements.

Pharmacy	BMI Switch	Days	Evidence Required	5 mg	7.5 mg	10 mg	12.5 mg	15 mg
Medicine Marketplace	30/27	28	Current BMI	→0.25mg	→0.25mg	→0.25mg	→0.25mg	→0.25mg

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Swap but Drop Pharmacies

These pharmacies allow immediate switching from Mounjaro to Wegovy: but limit the supply to the lowest dose.

Pharmacy	BMI Switch	Days	Evidence Required	5 mg	7.5 mg	10 mg	12.5 mg	15 mg
Happy Pharmacy	26	7	Proof of Mounjaro dose required	→0.25mg	→0.25mg	→0.25mg	→0.25mg	→0.25mg
OnlineMeds	20	7	Proof of Mounjaro dose required	→0.25mg	→0.25mg	→0.25mg	→0.25mg	→0.25mg
Tribelle	22	7	Initial GLP starting BMI	→0.25mg	→0.25mg	→0.25mg	→0.25mg	→0.25mg

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Hot Swap Pharmacies

These pharmacies allow a direct switching from Mounjaro to Wegovy with minimal barriers.

Pharmacy	BMI Switch	Days	Evidence Required	5 mg	7.5 mg	10 mg	12.5 mg	15 mg
Cuva Health	22	7	Proof of Mounjaro dose required / Initial BMI	→0.5mg	→1mg	→1.7mg	→2.4mg	→2.4mg
Dr Weightmans	21	7	Proof of Mounjaro dose required / Initial BMI	→1mg	→1.7mg	→1.7/2.4mg	→2.4mg	→2.4mg
Farmeci	24	7	Proof of Mounjaro dose required	→0.5mg	→1mg	→1.7mg	→1.7mg	→2.4mg
Fylde Clinic	23	7	Proof of Mounjaro dose required	→0.25mg	→0.5mg	→0.5mg	→1mg	→1mg
Get A Drip	19.5	7	Proof of Mounjaro dose required	→0.5mg	→0.5mg	→1mg	→1mg	→1mg
Juniper	22	7	Proof of Mounjaro dose required	→0.5mg	→1mg	→1.7mg	→2.4mg	→2.4mg
Lloyds Pharmacy	25	7	Proof of Mounjaro dose required	→1mg	→2.4mg	→2.4mg	→2.4mg	→2.4mg
Lotus Weight Loss	20	7	Proof of Mounjaro dose required	→0.5mg	→1mg	→1.7mg	→2.4mg	→2.4mg
Medicspot	21	7	Proof of Mounjaro dose required	→0.5mg	→1mg	→1.7mg	→1.7mg	→1.7mg
MSH Weight Loss	20	7	Proof of Mounjaro dose required / Initial BMI	→0.5mg	→0.5mg	→1mg	→1mg	→1mg
My London Pharmacy	24	7	Proof of Mounjaro dose required	→0.5mg	→1mg	→1.7mg	→1.7mg	→2.4mg
Oushk	22	7	Proof of Mounjaro dose required	→0.5mg	→1mg	→1mg	→1.7mg	→1.7mg
Pharmacy2U	25	7	Proof of Mounjaro dose required	→1mg	→2.4mg	→2.4mg	→2.4mg	→2.4mg
Pharmacy Online	25	7	Proof of Mounjaro dose required / Initial BMI	→1mg	→1mg	→1.7mg	→1.7mg	→2.4mg
PillSorted	24	7	Proof of Mounjaro dose required / Initial BMI	→0.25mg	→0.5mg	→1mg	→1mg	→1mg
PrivateDoc	21	7	Proof of Mounjaro dose required / Initial BMI	→0.5mg	→1mg	→1mg	→1mg	→1mg
Quickmeds	24	7	Proof of Mounjaro dose required	→0.5mg	→0.5mg	→0.5mg	→0.5mg	→0.5mg
Simple Online Pharmacy	24	7	Proof of Mounjaro dose required	→0.5mg	→1mg	→1mg	→1.7mg	→1.7mg
WePrescribe	21	7	Proof of Mounjaro doses required	→0.5mg	→1mg	→1mg/1.7mg	→1.7mg	→1.7mg/2.4mg

Switching from Mounjaro to Wegovy: Studies?

Clinical Data?

There are currently no published clinical trials looking at people switching from Mounjaro (tirzepatide, at any dose) to Wegovy (semaglutide, at any dose). The major studies of these medicines tested them separately, or compared them side by side, but did not examine the effect of moving from one to the other. In the UK, such a switch may still be offered by a prescriber or pharmacy, but this type of prescribing is considered off-licence. Off-licence means people use the medicine outside the strict conditions of its licence.

This means there is no direct trial evidence to predict outcomes. A switch can still be made if the prescriber believes it is appropriate, but it should be done with careful monitoring, and patients should be aware that results may differ from those seen in the clinical studies for each medicine individually. Pharmacies should not recommend swapping to Wegovy based on price; the choice rests with the patient, in consultation with their prescriber.