Authentic Eli Lilly Mounjaro - Back of Arm Injection UK

  • 100% authentic Eli Lilly Mounjaro pens - never counterfeit
  • UK-sourced with full MHRA traceability documentation
  • GPhC-registered pharmacy with verified supply chains
  • From £129.99 first order - £40 off with code FIRST40
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Treatment from £144.99

Takes under 2 minutes · 100% online
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Check if you're eligible

Height 175 cm
Weight 82 kg
Your BMI
26.8
Check with prescriber
Start free consultation
Free · BMI thresholds shown are illustrative. Final eligibility is confirmed by a UK prescriber during your free consultation.
100% UK-based pharmacy Free advice & support Rated Excellent 2,400+ reviews
Which route suits you

Two clinically backed paths to results

A weekly GLP-1 injection or a daily capsule — each fully overseen by our UK pharmacy team, with no obligation to continue.

Treatment
Avg. weight loss
05%10%15%20%25%
Availability
Injection
Weekly pen · GLP-1
Avg. weight loss
~20%up to
Availability Available now
Pill NEW
Daily tablet · Oral GLP-1
Avg. weight loss
~17%up to
Availability Explore now
Live Pricing

Our Range

Prices update live and may change. The live table below always takes precedence.
All treatment is subject to a prescriber consultation and clinical approval.

Why Choose Authentic UK Mounjaro for Back of Arm Injection

Assured Authentic Eli Lilly Mounjaro Pens

When injecting Mounjaro into the back of your arm, medication authenticity is critical for your safety and treatment success. Our GPhC-registered UK pharmacy exclusively supplies genuine Eli Lilly tirzepatide pens through MHRA-regulated supply chains. Every pen comes with full traceability documentation, batch verification, and authentic packaging. You can inject with confidence knowing your back of arm Mounjaro treatment uses only genuine medication.

UK-Sourced Mounjaro Pricing and Availability

Authentic single pens start from £129.99 for first-time customers (regular price £169.99 for 2.5mg strength). Higher doses include 5mg at £159.99 first order, 7.5mg at £209.99, and 10mg at £229.99. Our 2-pen Getting Started bundles offer better value - the Intro Duo (2.5mg + 5mg) costs £299.99 for first orders, perfect for beginning your back of arm injection routine with dose escalation.

Verified Supply Chain Documentation

Each authentic Mounjaro pen includes complete supply chain documentation from Eli Lilly through to our pharmacy. MHRA batch verification ensures every pen meets strict UK pharmaceutical standards. Our suppliers undergo regular inspections and maintain full regulatory compliance. When you order, you receive authentic medication certificates and batch tracking information for complete peace of mind.

Fast Clinical Assessment for Back of Arm Treatment

Our UK-qualified clinicians provide clinical assessment within 3 working days, or upgrade to express 24-hour approval for urgent orders. Assessment covers your suitability for back of arm Mounjaro injection alongside reduced-calorie diet and increased physical activity. Once approved, authentic pens dispatch immediately from our secure UK facility with discreet packaging.

Exclusive UK Pharmacy Benefits

First-time customers save £40 with code FIRST40 on authentic Mounjaro orders. Returning customers receive £25 off every subsequent order. All pens include injection guidance specifically for back of arm administration, disposal containers, and ongoing clinical support. Our 3-pen bundles provide additional savings - the Progress Trio (5mg, 7.5mg, 10mg) costs £634.99 first order versus £674.99 regular price.

Order Authentic Mounjaro Today

Start your authentic back of arm Mounjaro treatment with complete confidence in medication quality. Choose from single pens or money-saving bundles, complete your clinical assessment, and receive genuine Eli Lilly pens within days. UK-sourced, MHRA-regulated, and fully traceable - exactly what your treatment deserves.

NEW

GLP-1, now in adaily pill

Meet the daily GLP-1 tablet — needle-free, taken on your schedule, and prescribed by UK pharmacists. Designed for flexibility.

Join the free waitlist
Track your progress

Your journey,in your pocket

Track Now

Meet the newGLP-1 pill

  • Once-daily tablet · room-temp storage
  • No needles, no fridge
  • Up to ~15–17% in trials
How treatment works

How GLP-1 treatments help

Reduces appetite

Helps you feel fuller, sooner — so portions naturally shrink.

Curbs cravings

Quietens food noise so snacking and cravings ease off.

Slows digestion

Food stays in your stomach longer, steadying hunger between meals.

Steady blood sugar

Supports more stable glucose levels through the day.

Is GLP-1 treatment right for you?

GLP-1 medicines are powerful and prescription-only for good reason. They suit many people very well — and they aren’t appropriate for everyone. Here’s a clear, honest picture before you decide.

You may be suitable

Criteria met
BMI of 30 or higher
BMI of 27+ with weight-related conditions
Struggled to lose weight with diet alone
Ready to pair with lifestyle changes

Speak to us first

Potential risk
Pregnant, trying to conceive, or breastfeeding
History of certain thyroid cancers
Certain pancreatic or digestive conditions
Under the age of 18

Ready to start your journey?

Track your progress

Your journey, in your pocket

Track your journey

Log every dose and watch your progress build.

Download now Free to download — takes a minute to set up. App Store and Google Play

AI Meal Tracking. Built for GLP-1 Appetites.

Point your camera at any meal and in 4–6 seconds it logs the calories, macros, weight, and fullness it expects.

Never miss a dose

A daily nudge keeps you on track.

How it works

Achieve your goals in just a few simple steps.

Step 1

Start Free Consultation

Select safe UK treatments. Quick answers.

Step 2

Review By Our Clinical Team

Our expert team will use your consultation as the basis of our recommendation and communicate with you.

Step 3

Get it delivered fast

We’ll deliver direct to you, as quickly as tomorrow.

Trusted by thousands

Real people, real change

Hannah M.
Lost 2 st 4 lb in a year

“The cravings that used to run my evenings just quietened down. Having a pharmacist to message made it feel safe.”

David O.
Lost 3 st in a year

“Discreet, simple and genuinely supportive. The dose steps were explained clearly every time.”

Priya S.
Lost 1 st 9 lb in a year

“I finally feel like food isn’t the loudest thing in my head. The delivery was always discreet and on time.”

Frequently asked questions