Find the right weight-loss pen for your goals.
Compare Semaglutide, Tirzepatide, and Retatrutide options with clear facts, product photos, and support before you decide.
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Compare the three options
Product, strength, status, schedule, and price status in one place. Open the detail page when you want the full safety notes.
Price note
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| Product | Strength | Status | Typical schedule | Price | Next step |
|---|---|---|---|---|---|
 Semaglutide 20mg Adults 18+ only | 20mg | Prescription-only where licensed | Usually once weekly when prescribed | Confirm before payment | View details |
 Tirzepatide 20mg Adults 18+ only | 20mg | Prescription-only where licensed | Usually once weekly when prescribed | Confirm before payment | View details |
 Retatrutide 40mg Adults 18+ only | 40mg | Not approved; clinical-trial stage | Trial protocols only | Ask support first | View details |
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What to know before ordering
Read this before payment. It is not a diagnosis, prescription, or promise of results.
Prescription-only medicines+
GLP-1 medicines for weight management are prescription-only. A healthcare professional should check your BMI, health history, other medicines, pregnancy status, and risk factors before use.
Not for cosmetic weight loss+
Licensed semaglutide and tirzepatide medicines are used for people who meet medical criteria. They are normally used alongside diet, activity, and ongoing support rather than as a stand-alone shortcut.
Results vary+
Some people feel fuller and less hungry, but results vary. Dose, diet, activity, side effects, medical history, and adherence all matter. No weight, health, or treatment result is guaranteed.
Side effects matter+
Common side effects can include nausea, vomiting, diarrhoea, constipation, and abdominal discomfort. Severe or persistent symptoms need medical advice, especially if you cannot keep fluids down or symptoms worsen.
Strength is not mL volume+
The product pages show strength in mg, not liquid volume. If volume matters to you, ask support before ordering.
Pregnancy and contraception+
GLP-1 medicines are generally not recommended during pregnancy or breastfeeding. MHRA guidance says people who could become pregnant need contraception advice and wash-out timing before trying for pregnancy.
Retatrutide status+
Retatrutide is still being studied in clinical trials. Lilly says it has not been approved by any regulator and is legally available only through Lilly clinical trials.
Company
WeightLossPens.com is an adults-only product information and enquiry site. It is not a replacement for a registered pharmacy, prescriber assessment, or medical advice.
Before paying for prescription-only medicines, confirm the registered pharmacy, named prescriber review, delivery country, final price, and legal supplier.
FAQs
Which products are listed?+
The site shows Semaglutide 20mg, Tirzepatide 20mg and Retatrutide 40mg information pages. Each page shows the photo, strength, safety notes, support contact, and availability status before payment.
What is the difference between the options?+
Semaglutide is a GLP-1 medicine used in licensed medicines such as Wegovy. Tirzepatide acts on GLP-1 and GIP signals and is the active ingredient in Mounjaro. Retatrutide is different because it is still in clinical trials and is not an approved routine medicine.
How do I order?+
Use the enquiry form if you need anything confirmed first. If you continue to payment, check the product, strength, country availability, final price, and delivery details before paying.
Can people in America buy?+
No. US orders are not currently available, so do not use payment from the United States.
What benefits are possible?+
Some people feel fuller and less hungry on GLP-1 medicines when they are prescribed and used correctly. Results vary by person, dose, diet, activity, health history, and side effects. No weight, health, or treatment outcome is guaranteed.
What side effects should I know about?+
Common side effects can include nausea, vomiting, diarrhoea, constipation, and abdominal discomfort. Seek medical advice for severe, persistent, or worrying symptoms, or if you are pregnant, trying to become pregnant, breastfeeding, or taking other medication.
Are prices shown?+
The final price and currency must be confirmed before you pay. Ask support first if you want the current price checked before opening payment.
Why is strength not the same as mL volume?+
Strength in mg describes the amount of active ingredient shown on the product page. mL is liquid volume. They are not the same thing, so ask support if volume, concentration, or dose details matter to your decision.
Are pharmacy or prescriber details shown?+
Pharmacy registration and prescriber details are not published on this page. Before paying for prescription-only medicines, confirm the registered pharmacy, prescriber review, country availability, and legal supplier.
Are results guaranteed?+
No. The site provides product and ordering information only. It does not promise weight, health, or treatment outcomes.
Support
Email support before ordering if product details or payment are unclear.
Important information
- WeightLossPens.com is for adults aged 18 and over only.
- This site gives product information only.
- No weight, health, or treatment outcome is promised.
- If you have health concerns, take medication, are pregnant, or are nursing, speak to a healthcare professional before ordering.