Buy Mounjaro (Tirzepatide) Online
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Mounjaro for weight loss
At Happy Pharmacy, we’re committed to making health and wellness accessible. Mounjaro® (tirzepatide) is a groundbreaking weight loss medication designed to support adults in achieving significant weight loss. With convenient online ordering and expert support, we’re here to guide you every step of the way with our specialist online weight loss service.
We are an GPhc approved online pharmacy with over 25 years experience in helping our customers.
Product details
What is Mounjaro® (tirzepatide)?
Mounjaro® (tirzepatide) is a prescription-only weight loss injection containing the active ingredient tirzepatide.
Originally developed as a treatment for type 2 diabetes, Mounjaro has shown significant weight loss benefits in clinical trials. It is now used as a weekly injection to support weight reduction and improve metabolic health.
Why Choose Mounjaro®?
Mounjaro® offers a dual action for people who need help managing their weight:
Weight Loss: Significant reductions in body weight, with clinical studies showing average weight loss of up to 20% in some patients.
Improved Quality of Life: Helps you feel more energetic and in control of your health. Convenient, Once-Weekly Injection for weight loss.
How does Mounjaro® Work in the body?
Mounjaro mimics two hormones involved in appetite and blood sugar control: GLP-1 and GIP. This dual-action mechanism helps reduce hunger, slow digestion, improve insulin sensitivity, and promote feelings of fullness, supporting sustained weight loss.
GLP-1 (Glucagon-like peptide-1): Reduces appetite, slows digestion, and promotes feelings of fullness.
GIP (Glucose-dependent insulinotropic polypeptide): Enhances insulin sensitivity and works synergistically with GLP-1 to lower blood sugar levels.
By addressing both blood sugar control and weight management, Mounjaro® offers a comprehensive solution for better health.
Who is Mounjaro® for?
At Happy Pharmacy we prescribe Mounjaro® for use in adults aged between 18 and 75 years of age. You are eligible for Mounjaro if you are considered:
Clinically obese: with a body mass index (BMI) of 30 kg/m² or higher,
Overweight: with a BMI of 27 kg/m² or higher with weight-related conditions such as hypertension, high cholesterol, pre-diabetic, obstructive sleep apnoea.
If you’re unsure whether Mounjaro® is right for you, consult your GP or contact our team of experts
Benefits of Mounjaro®
1. Effective Weight Loss
Patients using Mounjaro® in clinical trials experienced:
Significant weight reduction (up to 20% body weight in some cases). Sustained results when combined with lifestyle changes.
2. Long-Term Health Benefits
Losing weight and controlling blood sugar can reduce the risk of:
- Heart disease and stroke.
- Type 2 diabetes complications.
- Weight-related conditions such as sleep apnoea and joint pain.
3. Simple, Once-Weekly Dosing
Mounjaro® is administered once a week, making it convenient for busy lifestyles.
What are the side effects of Mounjaro?
Mounjaro can cause side effects, particularly when starting or increasing the dose. Most are mild and temporary.
Very common side effects
- Nausea
- Diarrhoea
- Reduced appetite
- Constipation
Common side effects
- Vomiting
- Indigestion
- Fatigue
- Injection site discomfort
- Uncommon Mounjaro side effects
- Allergic reactions, Pancreatitis (rare but serious) Gallbladder issues - Seek medical advice if you experience persistent or severe side effects.
Managing side effects
Like all medications, Mounjaro and Wegovy can cause some side effects. Generally, these side effects are mild and are likely to diminish or even disappear after a few weeks of treatment.
We understand how challenging it can be to cope with these discomforts as your body adjusts to the medication. That’s why we’ve compiled our top tips for managing these potential side effects to help ease any discomfort you may experience. If you need any further assistance please do not hesitate to contact the Clinical Team at Happy Pharmacy.
Nausea and/or vomiting
Frequency: These side effects are very common (may affect more than 1 in 10 people) and are usually not severe. They are most common when first starting the treatment but decrease over time in most patients.
Management Tips:
Stay well-hydrated; aim for at least 8 cups of water daily.
Eat small, regular meals to avoid an empty stomach.
Try soothing beverages such as ginger, peppermint, or fennel teas.
Take anti-sickness medications such as Cyclizine to help manage symptoms of nausea and vomiting as your body adjusts to the treatment.
Visit the NHS website linked below for more information on dealing with nausea and vomiting.
When to Seek Assistance: If vomiting occurs more than three times a day or if you experience symptoms of dehydration (dark urine, dizziness), stop the treatment and consult NHS 111.
Constipation
Frequency: This side effect is very common (may affect more than 1 in 10 people) and is usually not severe. It is most common when first starting the treatment but decreases over time in most patients.
Management Tips:
Stay well-hydrated; aim for at least 8 cups of water daily.
Eat high-fiber foods such as prunes, figs and oats in your diet.
Consider increasing your activity as this can stimulate bowel movements.
Try a mild laxative.
Visit the NHS website linked here for more information on dealing with constipation.
When to Seek Assistance: If you’ve tried the management tips above but are still constipated or notice blood in your stool, consult your GP or NHS 111 for advice.
Headache
Frequency: This side effect is very common (may affect more than 1 in 10 people) and is usually not severe.
Management Tips:
Stay well-hydrated; aim for at least 8 cups of water daily.
Try to rest and relax.
Take a simple painkiller like paracetamol.
Visit the NHS website linked here for more information on managing headaches.
When to Seek Assistance: If you’ve tried the management tips above but your headaches persist or worsen consult your GP or NHS 111 for advice.
Heartburn
Frequency: This side effect is very common and often accompanied by nausea.
Management Tips:
Stay well-hydrated; aim for at least 8 cups of water daily.
Eat small, regular meals can help.
Avoid high-fat food that triggers your heartburn or makes it worse.
Take a simple acid reflux medication such as Gaviscon or your pharmacist may recommend a proton pump inhibitor (PPI) that reduces how much acid your stomach makes such as Omeprazole or Lansoprazole.
Visit the NHS website linked here for more information on managing heartburn.
When to Seek Assistance: If you’ve tried the management tips above but your heartburn persists or worsens, you have difficulty swallowing, are vomiting blood, or feel unwell, contact your GP or NHS 111 for advice.
Diarrhoea
Frequency: This side effect is very common (may affect more than 1 in 10 people) and is usually not severe. It is most common when first starting the treatment but decreases over time in most patients.
Management Tips:
Drink plenty of clear fluids, such as water or diluted squash.
Rest and eat small meals.
Consider oral rehydration salts, which can be obtained from your pharmacy.
Visit the NHS website linked here for more information on managing diarrhoea.
When to Seek Assistance: Persistent diarrhoea, the presence of blood, or an inability to stay hydrated warrants immediate contact with NHS 111.
Injection Site Reactions
Frequency: This side effect is common and may affect up to 1 in 10 people and often resolves as your body adjusts to the treatment.
Symptoms: Redness, bruising, itching, swelling, or pain.
Management Tips: Use a non drowsy antihistamine cream or take an antihistamine tablet.
When to Seek Assistance: If the reaction worsens, spreads, or becomes unbearable, discontinue the medication and consult your GP or NHS 111.
Gallstones and Gallbladder Inflammation
Frequency: Affects up to 1 in 10 users of Wegovy; up to 1 in 100 users of Mounjaro.
Management Tips:
Avoid rapid weight loss by maintaining a steady pace (no more than 1.5 kg or 3 lbs per week).
Stay hydrated and eat smaller, frequent meals.
When to Seek Assistance: Severe pain under the ribs, vomiting, fever, or other signs of gallbladder issues require immediate attention. Contact NHS 111 or visit A&E.
Adjusting Dosages to Minimise Side Effects
Mild Side Effects: Remain on your current dose for another week before increasing.
Moderate Side Effects: Reduce your dose for up to a week, then increase it gradually.
Severe Side Effects: Stop the medication immediately and seek medical advice.
Rare but Serious Side Effects
Pancreatitis: Symptoms include severe abdominal pain radiating to the back, nausea, or vomiting. Seek urgent medical attention via NHS 111 or A&E.
Anaphylaxis: Difficulty breathing, facial swelling, or severe allergic reactions necessitate calling 999 immediately.
Dehydration: Symptoms include urine being dark in colour, you can’t keep fluids down, you are passing urine less often than usual, or you are feeling light-headed. Drink more fluids and seek medical attention via NHS 111 or A&E.
Additional Information
Our pharmacy team is available to assist with any concerns or side effects. Additionally, you can report side effects via the Yellow Card Scheme or consult your healthcare provider for advice.
The Happy Pharmacy Team are at hand to provide accurate support and advice as needed throughout your weight loss journey.
For further inquiries, please do not hesitate to contact us at info@happypharmacy.co.uk
Patient Information
All Mounjaro doses are available to new and returning patients.
All strengths of the Mounjaro weight loss injection, from the introductory 2.5 mg dose to the maximum 15 mg dose, are available to both new and returning patients through our UK-based online doctor and pharmacy service. Whether you're starting your weight loss journey or continuing treatment, you can request Mounjaro online following a short online consultation.
How effective is Mounjaro?
Mounjaro has demonstrated significant weight loss results in clinical trials. Many patients lose 15–20% of their starting body weight when taking Mounjaro as part of a medically supervised weight loss treatment. Results vary depending on dose, duration, and individual lifestyle.
Average weight loss on different Mounjaro doses:
2.5 mg (starting dose): 3–5% weight loss after 4–6 weeks
5 mg: 7–10% weight loss
10 mg: 12–15% weight loss
15 mg: Up to 20% weight loss over time These figures are based on clinical trial averages and may vary depending on individual response and adherence to treatment.
How to use Mounjaro injections
Mounjaro comes in an easy-to-use pre-filled injection pen. It should be injected once weekly, on the same day each week. Always use a new needle for each injection and rotate injection sites. It can be taken with or without food, making it convenient to fit into your weekly routine.
Worried about self-injection?
Many people are initially concerned about self-injection, but Mounjaro's auto-injector makes the process simple and nearly pain-free. The pen is designed for ease of use at home and comes with clear step-by-step instructions.
Where should I inject Mounjaro?
Inject the Mounjaro pen into the fatty tissue of the abdomen or upper thigh. Avoid injecting near the same site each time to reduce irritation. You can also use the upper arm if someone else is administering the injection.
How to inject Mounjaro step by step
- Wash your hands and prepare the injection pen.
- Choose an injection site (abdomen or thigh).
- Clean the site with an alcohol wipe.
- Remove the pen cap.
- Press the pen firmly against your skin and activate the injector.
- Wait until the clicking stops.
- Remove the pen and dispose of it safely.
How long do I have to stay on Mounjaro?
Mounjaro is a long-term weight loss treatment. The duration depends on your weight loss goals, progress, and how well you tolerate the medication. Many patients stay on Mounjaro for 6–12 months or longer under medical supervision.
What happens when you stop taking Mounjaro?
Weight regain is possible if lifestyle changes are not maintained after stopping Mounjaro. To help maintain results, continue with healthy eating, regular exercise, and follow-up care with your doctor or pharmacist.
What Mounjaro dosages are available?
Mounjaro is available in escalating doses: 2.5 mg, 5 mg, 7.5 mg, 10 mg, 12.5 mg, and 15 mg. Patients typically start on 2.5 mg and increase gradually to reduce side effects and allow the body to adjust.
Mounjaro dosage options
Each person responds differently to Mounjaro. Your Mounjaro treatment starts with a low dose and increases gradually. This helps your body adjust and minimises potential side effects. The prescriber may increase the dose by 2.5mg increments every four weeks if well tolerated. A typical schedule may look like this:
- Weeks 1–4: Start with 2.5 mg
- Weeks 5–8: Increase to 5 mg (stay on this dose if it’s working well for you)
- Weeks 9–12: Move up to 7.5 mg
- Weeks 13–16: Increase to 10 mg (if still effective, you can stay here)
- Weeks 17–20: Step up to 12.5 mg
- Weeks 21+: Finally, move to 15 mg (maximum maintenance dose) Your dosage will be tailored based on your response, tolerability, and your online doctor’s advice.
Do not change your dose unless your prescribing healthcare professional has told you to.
Tip: If you notice any persistent side effects when increasing your dose, contact the Happy Pharmacy team for advice—we’re here to guide you
Who should not take Mounjaro?
Do not take Mounjaro if you:
- Are allergic to tirzepatide
- Have a history of pancreatitis
- Are pregnant or breastfeeding
- Have thyroid cancer or a family history of medullary thyroid carcinoma Consult your doctor before starting Mounjaro if you have any existing medical conditions.
What foods should I avoid on Mounjaro?
Avoid high-fat, greasy, or sugary foods that can worsen nausea. Eat smaller meals and avoid alcohol when possible, especially early in treatment.
Mounjaro warnings and risks
Mounjaro may cause gastrointestinal side effects and can increase the risk of certain conditions, such as thyroid tumours. Always read the patient leaflet and consult a healthcare provider before use.
Mounjaro interactions
Mounjaro may affect how other medications are absorbed, especially oral drugs. Discuss all current medications with your Happy Pharmacy online doctor during your consultation.
What are the best Mounjaro alternatives?
Wegovy (semaglutide) is an alternative to Mounjaro. This also uses GLP-1 receptor agonists to promote weight loss. Your Happy Pharmacy online doctor can help decide which is best for you.
While both Mounjaro and Wegovy are weight loss injections, Mounjaro targets two hormones (GLP-1 and GIP), while Wegovy only targets GLP-1. This dual action may make Mounjaro more effective for some patients. Both are prescription weight loss treatments.
How to buy Mounjaro online in the UK
You can buy Mounjaro online in the UK through a registered online pharmacy like Happy Pharmacy, after completing a short medical weight loss consultation. Your prescription will be reviewed by an online prescriber, and if suitable, Mounjaro will be delivered to your door.
Medically reviewed by Palvinder Deol, GPhC-registered Superintendent Pharmacist with over 25 years of experience in pharmaceutical care. Pavel Graduated from as a qualified pharmacist from the University of Bath in 1997.
Sources
FAQs
What is Mounjaro® used for?
Mounjaro® is primarily used in the NHS to manage type 2 diabetes and to aid weight loss in individuals with obesity or overweight with certain conditions.
Is Mounjaro approved for weight loss?
Yes, Mounjaro is now approved for weight loss in the UK for eligible patients. It was initially licensed for diabetes but is now authorised and licensed for weight loss management.
How much weight can I lose with Mounjaro®?
Clinical trials have shown weight loss of up to 20% of body weight in some patients, depending on dosage and lifestyle factors.
Do I need a prescription for Mounjaro®?
Yes, Mounjaro® is a prescription-only medication. The supply of Mounjaro is only made if it is safe and appropriate, following an online assessment by one of our clinical team.
How should I store Mounjaro®?
Store Mounjaro in the fridge at 2–8°C. Do not freeze. Keep the pen in its original packaging to protect it from light.
Storing Your Mounjaro Pens
- Before Use: Keep your pens in the refrigerator to maintain their effectiveness.
- After Opening: Once opened, you can store the pen at room temperature for up to 30 days.
With your first order, you will receive a sharps bin, a special waste bin for storing sharps materials like needles until they can be safely disposed of. After each use, place the needle into the sharps bin. Once you have used all 4 doses and removed the needle, you can dispose of the pen in your household waste or the sharps bin. When the sharps bin is full, your local council can collect it for disposal. After starting treatment, you can purchase additional sharps bins with new orders.
How long can Mounjaro be out of the fridge?
Mounjaro can be kept at room temperature (up to 30°C) for a total of 30 days. After that, it should be discarded if not used.
Why am I not losing weight on Mounjaro?
Weight loss varies. If you’re not seeing results, review your diet, activity levels, and consistency. It may also be time to adjust your dosage. Speak to your online Happy Pharmacy Team.
If you’re taking the contraceptive pill, can you use Mounjaro?
Yes, but Mounjaro may affect the absorption of oral contraceptives. Use additional contraception during the first 4 weeks or speak to our Clinical Team about how to manage this interaction safely.
Side Effects
Like all medications, Mounjaro® may cause side effects. The most common include:
• Nausea
• Vomiting
• Diarrhoea or constipation
• Decreased appetite
Serious but rare side effects may include pancreatitis or gallbladder issues. Please read our additional information section above for managing side effects, and always consult your GP and read the patient information leaflet for a full list.
Need Support? Contact Happy Pharmacy
Whether you have questions about your Mounjaro treatment, need tips for managing side effects, or require advice on dosing, our Happy Pharmacy healthcare team is here for you.
Your health is our priority— contact us any time
