Mounjaro Injections




Mounjaro (tirzepatide) is a breakthrough prescription injectable medication for weight loss and weight maintenance in adults with obesity or overweight with weight-related conditions. This medication is available through Chemist Doctor's regulated online service following a consultation with UK-licensed clinicians.
You must complete a short online consultation so that our prescriber can ensure that the treatment is suitable for you.
Product Name: | Mounjaro |
---|---|
Manufacturer: | Eli Lilly |
Active Ingredient: | Tirzepatide |
Administration: | Subcutaneous injection |
Presentation: | Injectable solution |
Available Strengths: | 2.5mg, 5mg, 7.5mg, 10mg, 12.5mg & 15mg |
Prescription Required: | Yes |
Dosage: | Once a week |
Suitable for pregnancy? | No |
Use with alcohol: | Avoid or limit alcohol consumption |
Dose | Package | Current Price | |
---|---|---|---|
2.5mg | Starter | £179.99 | |
5mg | Maintenance | £199.99 | |
7.5mg | Maintenance | £249.99 | |
10mg | Maintenance | £279.99 | |
12.5mg | Maintenance | £289.99 | |
15mg | Maintenance | £298.99 | |
Mounjaro is a weekly injection that aids weight loss. It belongs to the drug class GLP-1 analogue. Please consult with your healthcare provider before starting this medication. | |||
This treatment requires an online consultation for review by our medical team. The decision to supply the specific treatment and quantity requested will be based on whether our medical team are satisfied that it will be safe, appropriate, and effective. |
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Table of Contents
- What is Mounjaro?
- What is Mounjaro Used For?
- Before Using Mounjaro
- Mounjaro Contraindications
- Special Population Considerations
- Mounjaro and Other Medicines
- Pregnancy & Breastfeeding
- Driving & Machine Operation
- Mounjaro Ingredients
- How to Use Mounjaro KwikPen
- Mounjaro Dosage Guidelines
- Administration Instructions
- Missed Dose Management
- Overdose Information
- Mounjaro Side Effects
- How to Store Mounjaro
- Mounjaro Pack Information
- Mounjaro FAQs
What is Mounjaro?
Mounjaro is a prescription medication containing the active substance tirzepatide, presented as a solution for injection in a pre-filled KwikPen®. It belongs to a class of medicines called dual glucose-dependent insulinotropic polypeptide (GIP) and glucagon-like peptide-1 (GLP-1) receptor agonists.
Mechanism of Action
Mounjaro works through a dual-action mechanism:
- Appetite regulation: Acts on receptors in the brain to increase satiety signals and reduce hunger
- Metabolic enhancement: Improves insulin sensitivity and reduces glucagon secretion
- Gastric emptying: Slows down food movement from stomach to intestine
Imagine your appetite control system as a complex thermostat - Mounjaro helps recalibrate this system to reduce hunger signals and increase satisfaction after smaller meals.
What is Mounjaro Used For?
Mounjaro is indicated for weight management as an adjunct to:
- Reduced-calorie diet
- Increased physical activity
Approved Patient Groups
Patient Group | BMI Requirements | Additional Criteria |
---|---|---|
Adults (≥18 years) | BMI ≥30 kg/m² or BMI 27-29.9 kg/m² |
Weight-related comorbidities: - Prediabetes - Type 2 diabetes - Hypertension - Dyslipidaemia - Obstructive sleep apnoea - History of cardiovascular events |
Important Safety Notice:
Discontinue immediately and seek medical help if you experience:
- Severe abdominal pain (possible pancreatitis)
- Breathing difficulties or facial swelling (allergic reaction)
- Signs of dehydration (reduced urine output, dizziness)
Before Using Mounjaro
Essential considerations before initiating treatment:
Medical History Assessment
- Thyroid disease history (especially medullary thyroid carcinoma)
- Pancreatitis history (acute or chronic)
- Gastrointestinal disorders (gastroparesis)
- Diabetic retinopathy or macular oedema
- Renal impairment
Required Baseline Tests
- Thyroid function tests (TSH, calcitonin)
- Pancreatic enzymes (amylase, lipase)
- Renal function (eGFR, creatinine)
- Liver function (ALT, AST)
- Cardiovascular assessment
Mounjaro Contraindications
Absolute contraindications where Mounjaro must not be used:
Absolute Contraindications
- Personal or family history of medullary thyroid carcinoma (MTC)
- Multiple Endocrine Neoplasia syndrome type 2 (MEN 2)
- Hypersensitivity to tirzepatide or excipients
- Severe gastrointestinal disease (gastroparesis)
Special Warnings
Condition | Precaution |
---|---|
Pancreatitis history | Extreme caution; monitor enzymes monthly |
Diabetic retinopathy | Regular eye examinations recommended |
Cardiovascular disease | Monitor blood pressure and heart rate |
Special Population Considerations
Elderly Patients (≥75 years)
- Limited clinical experience
- Increased risk of dehydration - monitor fluid intake
Renal Impairment
- Mild-moderate impairment: No dose adjustment
- Severe impairment: Use with caution
Hepatic Impairment
- Limited data available
- Use with caution in severe impairment
Mounjaro and Other Medicines
Significant interactions requiring monitoring:
High-Risk Combinations
- Insulin/Sulfonylureas: Increased hypoglycaemia risk (dose reduction needed)
- Oral contraceptives: Reduced efficacy - use barrier methods
Absorption Interactions
Due to delayed gastric emptying:
- Take oral medications 1 hour before Mounjaro injection
- Particularly critical for:
- Antibiotics
- Thyroid medications
- Blood thinners (warfarin)
Pregnancy & Breastfeeding
Pregnancy
- Contraindicated during pregnancy
- Discontinue immediately if pregnancy occurs
- Use effective contraception during treatment
Breastfeeding
- Unknown if tirzepatide passes into breast milk
- Not recommended during breastfeeding
- Discuss alternatives with your doctor
Driving & Machine Operation
- No direct impairment of driving ability
- Caution advised due to possible:
- Dizziness
- Hypoglycaemia (when combined with other agents)
- Fatigue
- Do not drive if experiencing warning signs of low blood sugar
Mounjaro Ingredients
Active Substance
- Tirzepatide
Excipients
Ingredient | Function |
---|---|
Sodium phosphate dibasic heptahydrate | Buffer |
Benzyl alcohol | Preservative |
Glycerol | Solvent |
Phenol | Preservative |
Sodium chloride | Tonicity agent |
Sodium Content
- Less than 1 mmol sodium (23 mg) per dose
- Essentially 'sodium-free'
How to Use Mounjaro KwikPen
Preparation Steps
- Wash hands thoroughly
- Remove pen cap and inspect solution (should be clear and colorless to slightly yellow)
- Attach new needle
- Prime the pen to remove air bubbles
Injection Technique
- Sites: Abdomen, thighs, or upper arms
- Angle: 90° insertion
- Rotation: Change injection site weekly
- Duration: Hold dose button for 5 seconds after injection
Post-Injection Protocol
- Apply light pressure if bleeding occurs
- Carefully replace outer needle shield
- Unscrew and dispose of needle in sharps container
- Replace pen cap
Mounjaro Dosage Guidelines
Standard Titration Schedule
Treatment Week | Weekly Dose | Administration Notes |
---|---|---|
Weeks 1-4 | 2.5 mg | Starting dose |
Weeks 5-8 | 5 mg | |
Weeks 9-12 | 7.5 mg | |
Weeks 13-16 | 10 mg | |
Weeks 17-20 | 12.5 mg | |
Week 21 onwards | 15 mg | Maintenance dose |
Dose Adjustment Criteria
- Each dose increase requires at least 4 weeks at current dose
- Maximum dose: 15 mg weekly
- Do not increase dose if experiencing significant side effects
Administration Instructions
Step-by-step injection guide:
Dose Selection
- Turn dose knob until it stops at 0.6ml position
- Confirm dose indicator shows correct setting
- Never attempt partial doses
Injection Process
- Insert needle at 90° angle into clean skin
- Press and hold dose button completely
- Count slowly to 5 while keeping needle inserted
- Withdraw needle gently
Post-Injection Care
- Check dose window for confirmation of complete delivery
- Do not rub injection site
- Rotate sites weekly to prevent lipodystrophy
Missed Dose Management
General Principles
- Do NOT double doses
- Minimum 3 days between doses
Time-Based Guidance
Time Since Missed Dose | Action |
---|---|
≤4 days late | Administer immediately |
>4 days late | Skip dose; resume next scheduled dose |
Overdose Information
Symptoms
- Severe nausea/vomiting
- Hypoglycaemia
- Dehydration
- Abdominal pain
Management
- Seek immediate medical attention
- Bring medication packaging
- Symptomatic treatment:
- IV fluids for dehydration
- Glucose for hypoglycaemia
- Antiemetics if severe vomiting
Possible Side Effects
Very Common (more than 1 in 10 people)
- Nausea
- Diarrhoea
- Vomiting
- Abdominal pain
- Constipation
Common (1 in 10 to 1 in 100 people)
- Decreased appetite
- Indigestion (dyspepsia)
- Bloating
- Burping
- Reflux or heartburn
- Hair loss
- Fatigue
- Injection site reactions
Serious Side Effects
Effect | Frequency | Action Required |
---|---|---|
Acute Pancreatitis | Uncommon | DISCONTINUE immediately |
Severe Allergic Reactions | Rare | Emergency treatment |
Gallbladder Problems | Common (weight management) | Medical evaluation |
How to Store Mounjaro
Unused Pens
- Refrigerate at 2-8°C
- Do not freeze
- Keep in original carton
In-Use Pens
- May store at ≤30°C
- Use within 30 days of first use
- Discard after 4 doses
Disposal
- Dispose needles in sharps container
- Return unused pens to pharmacy
- Never dispose in household waste
Pack Information
Pack Sizes
- 1 pre-filled KwikPen (4 doses)
- 3 pre-filled KwikPens (12 doses)
Components
- Pre-filled pen (4 doses of 0.6ml each)
- Needles NOT included
- Instructions for use
Appearance
- Clear, colorless to slightly yellow solution
- Pre-filled disposable KwikPen
Where Can I Buy Mounjaro Online in the UK
Secure Mounjaro Prescription & Next-Day Delivery Service
Order Mounjaro with confidence through our UK-registered medical prescribers, who review all requests within 4 working hours. We guarantee same-day prescription approval for eligible patients and dispatch orders placed before 3pm for next-day tracked delivery.
Our Mounjaro service combines competitive pricing with strict adherence to MHRA safety standards, ensuring your medication is dispensed through GPhC-registered pharmacies. Every purchase includes discreet packaging and a GDPR-compliant consultation process.
Our clinical team ensures:
- Comprehensive medical history review
- BMI and weight-related condition assessment
- Drug interaction checks
- Personalised dosing guidance
Always consult your GP before starting weight management treatment. Not recommended for children under 18 or those with history of medullary thyroid carcinoma.
Mounjaro (Tirzepatide) FAQs
How much weight can I expect to lose with Mounjaro?
Clinical trials show average weight loss of:
- 12-15% at 15mg dose after 72 weeks
- Significant weight loss noticeable within first 12 weeks
- Results vary based on starting weight, adherence, and lifestyle changes
Can I drink alcohol while using Mounjaro?
Moderate alcohol consumption is generally acceptable but consider:
- Alcohol may worsen gastrointestinal side effects
- Increases pancreatitis risk (avoid heavy drinking)
- Calorie content may hinder weight loss
- Limit to ≤14 units/week with alcohol-free days
How long does a Mounjaro pen last?
Each KwikPen contains 4 weekly doses:
- 1 pen = 4 weeks of treatment
- 3 pens = 12 weeks of treatment
- Opened pens expire after 30 days regardless of remaining doses
What should I do for severe nausea?
For nausea management:
- Eat smaller, more frequent meals
- Avoid high-fat or spicy foods
- Stay hydrated with small sips of water
- Inject at bedtime
- Consult doctor if persistent beyond 2 weeks
Can I travel with Mounjaro pens?
Yes, with precautions:
- Use insulated bag with cool packs for air travel
- Never place in checked luggage
- Carry prescription documentation
- Maximum temperature 30°C during travel
What should I do if I see blood after injection?
Apply gentle pressure with clean gauze for 1-2 minutes. Do not rub. Small bleeds are common and harmless. Contact your clinician if:
- Bleeding persists >5 minutes
- You notice significant bruising
- Injection site becomes warm or painful
Can I use Mounjaro if I have type 2 diabetes?
Yes, Mounjaro is approved for:
- Type 2 diabetes management
- Weight management in adults with type 2 diabetes
- May be used alone or with other diabetes medications
- Requires blood glucose monitoring when used with insulin or sulfonylureas
How should I dispose of used Mounjaro pens?
Proper disposal protocol:
- Remove needle and place in sharps container
- Place empty pen in household waste
- Never recycle medical devices
- Return unused pens to pharmacy
Can I switch injection days?
Yes, with these guidelines:
- Minimum 3 days between doses
- Maximum 10 days between doses
- Select new day and maintain weekly schedule
- Example: From Monday to Thursday is acceptable
- Avoid frequent day changes
What should I do if my weight loss plateaus?
If weight loss stalls for >4 weeks at maintenance dose:
- Re-evaluate calorie intake and activity levels
- Consider consulting a nutritionist
- Ensure proper injection technique
- Discuss medication alternatives with your doctor
Plateaus are common after 6-9 months of treatment.
How soon can I expect results?
Most patients see initial weight loss within 4-8 weeks, with optimal results after 6 months of continuous use.
- Week 1-4: Appetite suppression begins
- Month 2: Noticeable weight changes
- Month 6: Full therapeutic effect
Can I combine with other weight loss methods?
Combine with dietary changes and exercise for enhanced results, as recommended by NICE guidelines.
- Recommended: Calorie tracking + weekly exercise
- Optional: Behavioural therapy
- Consultation required for combination with other medications
Related Guides
Getting your medication is quick and easy with our simple 4-step process:
Start Consultation
Complete our brief health questionnaire about your medical history and current health.
Medical Review
UK-registered clinicians review your consultation for safe prescribing.
Pharmacy Processing
If approved, our partner pharmacy prepares your medication.
Fast Dispatch
Your order is dispatched via your chosen delivery method.
What does the online consultation involve?
You'll answer questions about your medical history and current health to ensure safe prescribing. Honest responses are vital for your safety.
How do I reorder medication?
Use the login details emailed after your first order to access your account and reorder.
How does the secure chat portal work?
Clinicians may contact you via your account's chat portal to discuss your treatment. Respond securely within your account.
At Chemist Doctor, we respect your privacy and ensure complete discretion at every step.
Discreet Packaging
All orders are sent in tamper-evident, plain white boxes sealed within anonymous grey mailing bags.
Secure Data
Your personal and medical information is kept strictly confidential with SSL encryption.
Private Consultations
All consultations are conducted privately by UK-registered clinicians.
Anonymous Billing
Credit card statements show a neutral descriptor with no reference to medications.
Will my GP be informed about my order?
Only with your consent. We recommend updating your GP directly for seamless care.
We offer two reliable delivery options to suit your needs:
Service Type | Delivery Speed | Order Cut-off | Carrier |
---|---|---|---|
Standard Delivery | 2-3 business days | No cut-off | Royal Mail |
Premium Next-Day Delivery | Next business day | 3 PM weekdays | Royal Mail 24 |
Next-day delivery guarantee applies to orders approved before 3 PM to these regions:
- England
- Scotland
- Wales
- Northern Ireland
Service Restrictions: We currently cannot deliver to: Republic of Ireland, Continental Europe, USA, or Canada
Is packaging discreet?
Yes. All orders are shipped in plain, unmarked packaging via tracked courier services.
Do I need to stay home for delivery?
No. You'll receive a tracking number to monitor your parcel's progress.
Do you deliver on weekends or bank holidays?
Deliveries occur Monday–Friday only. We do not ship on weekends or UK bank holidays.
What should I do if my order hasn't arrived?
Use your tracking number to locate the parcel or contact our support team for assistance.
Can I receive delivery updates via SMS?
Yes. Provide your mobile number at checkout for courier updates. We will not use it for marketing purposes.
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How long do refunds take to process?
Card payments: Refunds appear in 3–5 days.
Bank transfers: We'll contact you for account details to return funds.
Why was my order declined?
Declined orders are not charged. Card authorisations release funds within 3–5 days (contact your bank for details).
Can I return prescription medication?
No. UK law prohibits returns of dispensed prescription treatments for safety reasons.
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