Our Weight Loss Treatments
Mounjaro (Tirzepatide) Injections
Wegovy Weight Loss Injections
Alli Weight Loss Capsules
Orlistat 120mg Capsules
Why choose our online weight loss service?
We provide safe, effective, and medically approved weight loss treatments that can be prescribed online and delivered straight to your door. Whether you’re looking to buy weight loss injections online such as Wegovy or Mounjaro, or prefer trusted weight loss tablets like Alli and Orlistat, our service makes it simple to start your journey. No long waiting times, awkward appointments, or pharmacy queues, just convenient, professional support for your health goals.
What’s Included:
- Free Online Weight Loss Medical Consultation – Quick, secure, and reviewed by licensed UK clinicians.
- Prescription-Only Treatments – Access to the latest in weight-loss medicine, including GLP-1 agonists like Wegovy & Mounjaro.
- Ongoing Support – Optional check-ins, dosage adjustments, and lifestyle guidance.
- Discreet Delivery – All medications arrive in unbranded, secure packaging.
- Fully Regulated – We are fully registered and regulated by the GPhC
How Our Online Weight-Loss Service Works
Our Weight loss injections and tablets
Wegovy (Semaglutide)
A once-weekly GLP-1 weight loss injection that mimics a natural hormone to reduce appetite and improve blood sugar control. Proven to help patients lose up to 15% of body weight.
Mounjaro (Tirzepatide)
A dual-action weight-loss injectable that targets both GLP-1 and GIP receptors, helping regulate appetite and metabolic function. One of the newest and most effective options available.
Orlistat 120mg capsules
A capsule taken with meals that blocks fat absorption. Available as a prescription (120mg) or over-the-counter (Alli – 60mg). Great for those looking for a non-injectable option that can help with weight loss.
Alli weight loss capsules (Orlistat 60mg)
The only approved weight-loss pill available without a prescription. Same active ingredient as Orlistat, at a lower dose.
Weight-Loss Medication Comparison
| Feature | Wegovy | Mounjaro | Orlistat (Rx) | Alli (OTC) |
|---|---|---|---|---|
| Active Ingredient | Semaglutide | Tirzepatide | Orlistat 120mg | Orlistat 60mg |
| Type | GLP-1 Agonist | GLP-1 & GIP Agonist | Lipase Inhibitor | Lipase Inhibitor |
| How It Works | Reduces appetite | Appetite + insulin control | Blocks fat absorption | Blocks fat absorption |
| Administration | Weekly injection | Weekly injection | Oral capsule | Oral capsule |
| Prescription | ✅ Yes | ✅ Yes | ✅ Yes | ❌ No |
| Avg. Weight Loss | Up to 15% | Up to 20% | 5–10% | 3–5% |
| Onset | Few weeks | Few weeks | Gradual | Gradual |
| Potential Side Effects | Nausea, diarrhoea, constipation | Nausea, diarrhoea, constipation | Oily stools, cramps | Oily stools, cramps |
| Best For | Moderate to severe needs | Higher BMI/metabolic | Non-injection option | First-time users |
| MHRA Approved | ✅ | ✅ | ✅ | ✅ |
Who Is Eligible for Weight-Loss Treatment?
Weight-loss medications can be suitable for adults who meet specific medical criteria. Eligibility depends on your BMI, medical history and whether you have any weight-related conditions. During your online consultation, our GPhC-registered pharmacists assess your information to ensure treatment is safe and appropriate.
General NHS Eligibility Criteria
Most UK weight-loss treatments follow NHS-aligned safety and eligibility guidelines. You may be suitable if:
- Your BMI is 30 or above
- Your BMI is 27 or above with a weight-related condition such as:
- high blood pressure
- high cholesterol
- pre-diabetes or type 2 diabetes
- obstructive sleep apnoea
- heart disease
- other metabolic conditions
- You are aged 18–75
- You are not pregnant or breastfeeding
- You are able to follow lifestyle changes (diet + increased activity)
- You do not have medical conditions or medications that prevent safe use
Eligibility by Treatment Type
Mounjaro Eligibility
- BMI 30+, or 27+ with comorbidities
- Not pregnant or breastfeeding
- Not currently taking another GLP-1 medicine
- Not suitable for type 1 diabetes
- Often recommended for insulin resistance or metabolic risk
Wegovy Eligibility
- BMI 30+, or 27+ with weight-related conditions
- Able to follow a calorie-controlled diet + increased activity
- Not pregnant or breastfeeding
- Not taking other GLP-1 medicines
Orlistat 120mg Eligibility
- BMI 28+
- Suitable for those preferring a non-injection treatment
- Must follow a low-fat diet
- Not suitable for chronic malabsorption or cholestasis
Alli Eligibility
- BMI 28+
- Over-the-counter option for adults
- Must follow a low-fat diet
- Not available for under-18s
BMI Eligibility Guide
| BMI Range | Eligibility | Notes |
|---|---|---|
| 18 – 24.9 | Not eligible | Healthy weight range for most adults |
| 25 – 27.9 | Not eligible for GLP-1 treatment | May benefit from lifestyle support |
| 27 – 29.9 | Eligible if comorbidities present | Applies to Wegovy & Mounjaro |
| 30+ | Eligible for GLP-1 treatment | Typically suitable for Wegovy or Mounjaro |
| 28+ | Eligible for Orlistat & Alli | OTC and prescription options available |
Save on Food While You Lose Weight
At Happy Pharmacy, we’re here to support every part of your health journey - including your wallet!
If you think weight loss medication is expensive, think again. Our Food Cost Savings Calculator shows how much money you could save on food simply by eating fewer calories - a natural effect of treatments like Wegovy®, Mounjaro®, and Orlistat.
Your food savings might even help cover the cost of your treatment. Try the calculator now and see the potential savings add up, daily, weekly, monthly, and yearly!
Mounjaro price changes: is it time to reassess?
With recent price increases for Mounjaro, now may be a good moment to review your treatment options. If you’re happy with your current medication and the new price works for you, there’s no need to change — Mounjaro remains a highly effective choice. But if you’d like to explore alternatives, our guide explains when switching to Wegovy could make sense, how the process works, and what to expect.
The Benefits of Losing Weight
Weight loss is more than a number on a scale, it’s about improving your overall health. Losing weight reduces the risk of conditions like heart disease, type 2 diabetes, and certain cancers. It also relieves stress on your joints, enhances sleep quality, and boosts energy levels. At Happy Pharmacy, we’re here to help you achieve these life-changing benefits.
Most types of weight loss medication work best when combined with exercise, sleep improvements, and better nutrition. Plus, treatments that help you to lose weight often encourage healthier eating habits, allowing you to eat less and lose weight naturally.
Wegovy vs Mounjaro – Dosage & Weight Loss Timeline
Choosing the right, effective weight loss treatment depends on your goals, medical history, and starting body weight. Both Wegovy and Mounjaro deliver weekly injections that result in noticeable progress, typically from body weight after 12 weeks onward. For some, weight loss can be achieved in even less time when combined with diet and exercise.
Your rate of weight loss will vary based on adherence to your weight loss plan, dietary habits, and physical activity levels.
At Happy Pharmacy, we provide both Wegovy and Mounjaro, two powerful, once-weekly injectable medications for weight loss. Whether you're just starting your journey or comparing treatment options, view our dosage timeline for what you can expect from each.
Working With You
Assessment
Spend a few minutes completing our simple online questionnaire about your symptoms and medical history to help us understand your health needs.
Review
Our clinicians carefully review your questionnaire to ensure the treatment is safe and suitable for you. If needed, they may contact you for more information to provide the best care.
Deliver
Once approved, your medication will be securely packaged and delivered to your door. We ensure fast and discreet delivery for your convenience and privacy.
Support
Our team is here to answer any questions you may have about your treatment. We provide ongoing support to help you manage your health confidently.
How do weight loss injections work?
Weight-loss injections such as Wegovy (semaglutide) and Mounjaro (tirzepatide) work by mimicking natural hormones that help control appetite, digestion and blood sugar levels. These medications send signals to your brain that make you feel fuller for longer, reduce cravings, and slow how quickly food leaves the stomach — making it easier to maintain a calorie deficit and lose weight sustainably.
Both medicines are injected once a week using a pre-filled pen, and doses are increased gradually over several weeks to reduce side effects.
How Mounjaro Works (Tirzepatide)
Mounjaro activates two key hormone pathways:
- GLP-1, which reduces appetite and slows digestion
- GIP, which improves insulin sensitivity and helps stabilise blood sugar
Acting on both receptors allows Mounjaro to control hunger more strongly than single-pathway treatments. In clinical trials, patients taking Mounjaro alongside healthy-lifestyle changes have achieved up to 20% weight loss2 over 18 months. This makes it particularly helpful for people with insulin resistance or pre-diabetes.
How Wegovy Works (Semaglutide)
Wegovy targets the GLP-1 receptor, a hormone released naturally after eating. By enhancing this signal, Wegovy helps you feel full sooner, reduces food cravings and slows gastric emptying — supporting long-term calorie control. Clinical trials show that adults using Wegovy with a balanced diet and increased activity can expect around 15–17% weight loss on average1.
Why These Treatments Are Effective
GLP-1 and GIP–based treatments support weight management by:
- lowering appetite
- reducing cravings and emotional eating
- slowing digestion to prolong fullness
- stabilising blood sugar levels
- helping you follow a reduced-calorie diet more comfortably
During your online consultation, our GPhC-registered pharmacists assess your medical history, BMI, and lifestyle to ensure any treatment prescribed is both safe and suitable for your health needs.
How do weight loss tablets work?
Prescription weight-loss tablets such as Orlistat (branded as Alli) work differently from injections. Instead of affecting appetite, they block the absorption of up to 30% of dietary fat, meaning fewer calories are absorbed by the body.
When used alongside a lower-fat, reduced-calorie diet, Orlistat can support a 5 to 10% reduction in body weight3 within a few months. It is often prescribed for adults with a BMI of 28 or higher, especially when lifestyle changes alone have not produced results.
All medications supplied by Happy Pharmacy are dispensed by UK-based GPhC licensed pharmacists and authorised for use by the Medicines and Healthcare products Regulatory Agency (MHRA). During your online consultation, our pharmacists assess each case individually to ensure every treatment is safe, effective, and appropriate for your health profile.
FAQs
Are weight-loss injections safe for long-term use?
Yes. When prescribed correctly, Wegovy and Mounjaro are safe for long-term use. Most side effects occur early and settle as your body adjusts.
How quickly will I see results from weight-loss treatment?
Most people notice reduced appetite within a few weeks, with steady weight loss over the first 2–3 months depending on dose and lifestyle.
What happens if I stop taking weight-loss medication?
Your appetite and digestion return to normal, which may lead to some weight regain. Healthy habits help maintain results.
Can I drink alcohol while using weight-loss injections?
Yes, but alcohol may worsen nausea and slow progress. Drink cautiously if you have metabolic conditions.
Can I switch between Wegovy, Mounjaro, and Orlistat?
Yes, switching is possible after a clinical review. The best option depends on your response, goals, and medical history.
What should I eat while using weight-loss injections?
Choose smaller, balanced meals with lean protein and fibre. High-fat meals can worsen nausea during dose increases.
Are weight-loss medications available on the NHS?
Some treatments are offered on the NHS, but eligibility is strict. Private prescribing is available for adults with a BMI of 30+, or 27+ with conditions.
Can I use weight-loss medication if I have diabetes, PCOS, or other conditions?
Often yes. These treatments suit many people with PCOS, type 2 diabetes, or high blood pressure. They are not suitable for type 1 diabetes or pregnancy.
Which treatment is right for me?
When deciding between injections and tablets, consider how they’re taken, their effectiveness, cost, and side effects:
- Injections: Often provide more significant weight loss (15-20%) but are higher in cost and require needle use.
- Tablets/Capsules: A simpler, less invasive option, generally resulting in around 5% weight loss.
Both types are effective when used as part of a broader lifestyle plan that includes diet and exercise.
What are the side effects of weight loss treatment?
Weight loss injections like Mounjaro and Wegovy can cause common side effects such as nausea, constipation, diarrhoea, or injection-site reactions. particularly during dose escalation. These are typically mild and manageable.
Tablets may cause digestive issues if dietary fat is not controlled. Our online pharmacist provides clear guidance to reduce discomfort, and such effects often diminish over time. Safety remains central, with regular check-ins and weight loss support offered throughout your regimen.
How should I store and use my weight-loss pen safely?
Store new pens in the fridge, never freeze them, and inject once weekly following your dose plan. Rotate injection sites and dispose of needles safely.
Can weight-loss injections cause severe side effects?
Severe effects are rare. Most people only experience mild digestive symptoms that improve as treatment continues.
Do I need blood tests before starting weight-loss treatment?
Usually no. Tests may be advised if you have diabetes, thyroid issues, or liver concerns.
Can I take weight-loss treatment while breastfeeding or trying to get pregnant?
No. These medications must not be used in pregnancy or breastfeeding and should be stopped several weeks before trying to conceive.
What if my weight plateaus while using medication?
Plateaus are common. Adjusting portions, increasing activity, or reviewing your dose can help restart progress.
References
1. Wegovy (Semaglutide) – Clinical Evidence
• STEP-1 Trial – Once-weekly semaglutide in adults with overweight or obesity (primary efficacy data) – NEJM
• STEP-1 Clinical Trial Registration – ClinicalTrials.gov
• Semaglutide for weight management – PubMed
2. Mounjaro (Tirzepatide) – Clinical Evidence
• SURMOUNT-1 Trial – Tirzepatide for the treatment of obesity (20% weight-loss data) – NEJM
• SURMOUNT-1 Clinical Trial Registration – ClinicalTrials.gov
• Tirzepatide weight-loss outcomes – PubMed
• Tirzepatide dual GLP-1/GIP mechanism – PubMed
3. Orlistat & Alli – Clinical & Safety Evidence
• NICE CKS – Orlistat prescribing information – NICE
• MHRA safety update – Orlistat – MHRA
4. NHS Eligibility & Lifestyle Guidance
• NHS weight-loss treatment guidance – NHS
• NHS healthy eating / reduced-fat diet – NHS
Regulatory, Safety & Product Information
• MHRA authorisation of Mounjaro for weight management – gov.uk
• MHRA approval of Wegovy (semaglutide) for reducing cardiovascular risk – gov.uk
• Happy Pharmacy – GPhC Registration Record – GPhC
• Weight-loss injections explained – British Heart Foundation
• How to use Mounjaro – Official Eli Lilly Instructions – Eli Lilly
• Mounjaro Patient Booklet (PDF) – Eli Lilly
• Wegovy weight-management resources – Novo Nordisk
Medically Reviewed by Our GPhC-Registered Pharmacists
Authored by:
Palvinder DeolSuperintendent Pharmacist
Over 25 years’ clinical experience.
GPhC: 2047066
This article was medically reviewed for accuracy, safety, and alignment with UK clinical standards. Learn about our medical review process →
Content last updated: 20th November 2025 · Next review: December 2025
GPhC Inspection Result
Inspection Outcome: All Standards Met ✅
Our digital-first pharmacy achieved rare “Good Practice” recognition during our GPhC inspection on 19 May 2025 — showcasing our commitment to safe, high-quality and innovative online healthcare.
View full inspection report →GPhC Registration No. 9012585 | Inspected 19 May 2025
