GPhC Registered · Free Eligibility Check

Mounjaro vs Wegovy: Which Is Right for You?

Both are clinically proven, MHRA-approved weight loss injections. Here's a complete side-by-side comparison to help you choose.

Mounjaro

22.5%

avg. weight loss

Wegovy

20.7%

avg. weight loss

Check Your Eligibility — Free Or call 0161 543 6622

Quick Comparison

Key differences between both medications at a glance

Active IngredientTirzepatideSemaglutide

MechanismDual GIP + GLP-1GLP-1 only

Avg. Weight LossUp to 22.5%Up to 20.7%

DosingWeekly injectionWeekly injection

Starting Dose2.5mg0.25mg

Max Dose15mg2.4mg

Results Timeline2–4 weeks2–4 weeks

Trial Duration72 weeks68 weeks

MHRA ApprovedYesYes

PriceFrom £35/weekFrom £23/week

Eligibility CheckFreeFree

UK DeliveryFree trackedFree tracked

Clinical Evidence

Results from landmark clinical trials

Mounjaro (SURMOUNT-1 Trial)

2,539 participants

22.5%

Weight loss at 15mg

91%

Lost at least 5%

20.9% weight loss at 10mg doseExcellent

15% weight loss at 5mg doseVery Good

69% lost at least 15% body weightSuperior

Wegovy (STEP Trials)

Thousands of participants across multiple trials

20.7%

Weight loss at 2.4mg

85%

Lost at least 5%

69% lost at least 15% body weightVery Good

68-week clinical trial dataEstablished

Approved since 2021, proven track recordProven

1.8–2%

Greater weight loss with Mounjaro in head-to-head studies

Earlier

Wegovy approved first with longer real-world safety data

Both

Highly effective when combined with lifestyle changes

Which Treatment Is Right for You?

Guidance based on your health profile and goals

Choose Mounjaro if…

Mounjaro may be better suited for you if:

You want maximum weight loss potential

Clinical data shows higher average weight loss through dual hormone action

You have type 2 diabetes

Superior blood sugar control; may allow reduction in other diabetes medications

You experienced nausea with Wegovy

Generally better gastrointestinal tolerability and lower discontinuation rates

You prefer the latest treatment

Newest advancement in weight loss medication with the most recent clinical data

Example patient: Male, 42, BMI 38, type 2 diabetes, previous Wegovy user with nausea, seeking maximum weight loss.

Choose Wegovy if…

Wegovy may be better suited for you if:

You prefer an established track record

On the market since 2021 with extensive real-world safety data

You have cardiovascular concerns

More extensive cardiovascular outcome data — SELECT trial showed heart benefits

Your insurance covers Wegovy

Some policies cover Wegovy specifically — check with your provider

You prefer a cautious approach

Well-established safety profile, used by millions worldwide

Example patient: Female, 55, BMI 34, heart disease history, cautious about new medications, prioritising safety data.

Not sure which? Our clinicians will recommend the right one for you.

Check Your Eligibility — Free

Dosing Schedule

Both are weekly injections with gradual dose increases

Mounjaro Schedule

MonthDosePurpose

Month 12.5mgInitiation

Month 25mgTherapeutic dose begins

Month 37.5mgIncreased effectiveness

Month 410mgHigher therapeutic dose

Month 512.5mgMaximum dose approach

Month 6+15mgMaximum maintenance

Wegovy Schedule

MonthDosePurpose

Month 10.25mgInitiation

Month 20.5mgEarly titration

Month 31mgMid-range dose

Month 41.7mgTherapeutic range

Month 5+2.4mgMaximum maintenance

Administration (Both)

Weekly injection

Pre-filled pen

Subcutaneous

Same day each week

Training Included

Complete injection training
Pen device demonstration
Injection site rotation guidance
Storage and disposal instructions

Side Effects Comparison

Both have similar side effects that typically improve within 4–8 weeks

Side EffectMounjaroWegovy

Nausea25–30%30–44%

Diarrhoea20–25%20–30%

Constipation15–20%20–24%

Vomiting10–15%15–24%

Abdominal Pain10–12%10–20%

Fatigue8–12%8–11%

Decreased AppetiteMost patientsMost patients

Key Differences

Wegovy: higher nausea incidence during dose escalation

Mounjaro: generally better tolerated per discontinuation rates

Both: side effects are mild-to-moderate and decrease over time

How We Help Manage Them

Gradual dose titration protocols
Anti-nausea medication if needed
Dietary guidance to minimise symptoms
Ongoing pharmacist support

Frequently Asked Questions

Common questions about Mounjaro vs Wegovy

Which is more effective, Mounjaro or Wegovy?

Clinical trials show Mounjaro (tirzepatide) achieves up to 22.5% weight loss through dual GIP/GLP-1 action, while Wegovy (semaglutide) achieves up to 20.7% through GLP-1 action alone. Both are clinically proven and MHRA-approved.

Can I switch between Mounjaro and Wegovy?

Yes, switching is possible under medical supervision. If one medication isn't producing desired results or causes intolerable side effects, your pharmacist at The Chemist Live can guide you through a safe transition to the alternative.

Which has fewer side effects?

Both have similar gastrointestinal side effects (nausea, diarrhoea, constipation) that typically improve within 4–8 weeks. Clinical data suggests Mounjaro may be slightly better tolerated, with lower discontinuation rates.

Is one better for type 2 diabetes?

Both are licensed for type 2 diabetes. Mounjaro's dual GIP/GLP-1 action may offer enhanced blood sugar control. Your pharmacist will assess which is clinically appropriate based on your full health profile.

How much does treatment cost?

Mounjaro starts from £35 per week (£149.99/month) and Wegovy from £23 per week (£99.96/month) at The Chemist Live. The initial eligibility check is completely free. Pricing varies by dose — your clinician will recommend the right starting dose.

How long until I see results?

Weight loss typically begins within the first 4 weeks. Significant results are usually seen after 3–6 months of consistent treatment alongside lifestyle changes.

Can I get these on the NHS?

NHS availability for weight loss is limited with strict criteria and long waits. The Chemist Live offers private prescriptions with faster access — free eligibility check, clinician review, and UK-wide delivery.

Do you deliver across the UK?

Yes. Free tracked delivery across the UK on all weight loss medications. Same-day collection is also available from our Manchester pharmacy.

How do I decide which is right for me?

Start with our free online eligibility check. A GPhC-registered clinician reviews your BMI, medical history, medications, and goals to recommend the most suitable treatment for you.

Ready to Start Your Weight Loss Journey?

Our clinicians will review your health profile and recommend the right treatment. Free eligibility check, free UK delivery.

Check Your Eligibility — Free 0161 543 6622

GPhC Registered · MHRA Licensed · 4.9/5 Rating · 5,000+ Patients

GPhC Registered · Free Eligibility Check

Mounjaro vs Wegovy: Which Is Right for You?

Both are clinically proven, MHRA-approved weight loss injections. Here's a complete side-by-side comparison to help you choose.

Mounjaro

22.5%

avg. weight loss

Wegovy

20.7%

avg. weight loss

Check Your Eligibility — Free Or call 0161 543 6622

Quick Comparison

Key differences between both medications at a glance

Active IngredientTirzepatideSemaglutide

MechanismDual GIP + GLP-1GLP-1 only

Avg. Weight LossUp to 22.5%Up to 20.7%

DosingWeekly injectionWeekly injection

Starting Dose2.5mg0.25mg

Max Dose15mg2.4mg

Results Timeline2–4 weeks2–4 weeks

Trial Duration72 weeks68 weeks

MHRA ApprovedYesYes

PriceFrom £35/weekFrom £23/week

Eligibility CheckFreeFree

UK DeliveryFree trackedFree tracked

Clinical Evidence

Results from landmark clinical trials

Mounjaro (SURMOUNT-1 Trial)

2,539 participants

22.5%

Weight loss at 15mg

91%

Lost at least 5%

20.9% weight loss at 10mg doseExcellent

15% weight loss at 5mg doseVery Good

69% lost at least 15% body weightSuperior

Wegovy (STEP Trials)

Thousands of participants across multiple trials

20.7%

Weight loss at 2.4mg

85%

Lost at least 5%

69% lost at least 15% body weightVery Good

68-week clinical trial dataEstablished

Approved since 2021, proven track recordProven

1.8–2%

Greater weight loss with Mounjaro in head-to-head studies

Earlier

Wegovy approved first with longer real-world safety data

Both

Highly effective when combined with lifestyle changes

Which Treatment Is Right for You?

Guidance based on your health profile and goals

Choose Mounjaro if…

Mounjaro may be better suited for you if:

You want maximum weight loss potential

Clinical data shows higher average weight loss through dual hormone action

You have type 2 diabetes

Superior blood sugar control; may allow reduction in other diabetes medications

You experienced nausea with Wegovy

Generally better gastrointestinal tolerability and lower discontinuation rates

You prefer the latest treatment

Newest advancement in weight loss medication with the most recent clinical data

Example patient: Male, 42, BMI 38, type 2 diabetes, previous Wegovy user with nausea, seeking maximum weight loss.

Choose Wegovy if…

Wegovy may be better suited for you if:

You prefer an established track record

On the market since 2021 with extensive real-world safety data

You have cardiovascular concerns

More extensive cardiovascular outcome data — SELECT trial showed heart benefits

Your insurance covers Wegovy

Some policies cover Wegovy specifically — check with your provider

You prefer a cautious approach

Well-established safety profile, used by millions worldwide

Example patient: Female, 55, BMI 34, heart disease history, cautious about new medications, prioritising safety data.

Not sure which? Our clinicians will recommend the right one for you.

Check Your Eligibility — Free

Dosing Schedule

Both are weekly injections with gradual dose increases

Mounjaro Schedule

MonthDosePurpose

Month 12.5mgInitiation

Month 25mgTherapeutic dose begins

Month 37.5mgIncreased effectiveness

Month 410mgHigher therapeutic dose

Month 512.5mgMaximum dose approach

Month 6+15mgMaximum maintenance

Wegovy Schedule

MonthDosePurpose

Month 10.25mgInitiation

Month 20.5mgEarly titration

Month 31mgMid-range dose

Month 41.7mgTherapeutic range

Month 5+2.4mgMaximum maintenance

Administration (Both)

Weekly injection

Pre-filled pen

Subcutaneous

Same day each week

Training Included

Complete injection training
Pen device demonstration
Injection site rotation guidance
Storage and disposal instructions

Side Effects Comparison

Both have similar side effects that typically improve within 4–8 weeks

Side EffectMounjaroWegovy

Nausea25–30%30–44%

Diarrhoea20–25%20–30%

Constipation15–20%20–24%

Vomiting10–15%15–24%

Abdominal Pain10–12%10–20%

Fatigue8–12%8–11%

Decreased AppetiteMost patientsMost patients

Key Differences

Wegovy: higher nausea incidence during dose escalation

Mounjaro: generally better tolerated per discontinuation rates

Both: side effects are mild-to-moderate and decrease over time

How We Help Manage Them

Gradual dose titration protocols
Anti-nausea medication if needed
Dietary guidance to minimise symptoms
Ongoing pharmacist support

Frequently Asked Questions

Common questions about Mounjaro vs Wegovy

Which is more effective, Mounjaro or Wegovy?

Can I switch between Mounjaro and Wegovy?

Which has fewer side effects?

Is one better for type 2 diabetes?

How much does treatment cost?

How long until I see results?

Weight loss typically begins within the first 4 weeks. Significant results are usually seen after 3–6 months of consistent treatment alongside lifestyle changes.

Can I get these on the NHS?

Do you deliver across the UK?

Yes. Free tracked delivery across the UK on all weight loss medications. Same-day collection is also available from our Manchester pharmacy.

How do I decide which is right for me?

Start with our free online eligibility check. A GPhC-registered clinician reviews your BMI, medical history, medications, and goals to recommend the most suitable treatment for you.

Ready to Start Your Weight Loss Journey?

Our clinicians will review your health profile and recommend the right treatment. Free eligibility check, free UK delivery.

Check Your Eligibility — Free 0161 543 6622

GPhC Registered · MHRA Licensed · 4.9/5 Rating · 5,000+ Patients