PenCompare Guides & Resources
Navigate your online pharmacy journey with confidence. Explore our expert resources on safety, consultations, and how to choose the right provider.
Explore The Guides
Consultations
What an online consultation involves, what you will be asked, and how prescribers decide whether treatment is appropriate.
Delivery
Standard and tracked delivery options, typical dispatch windows, cold-chain handling, and what happens if an order goes missing.
Safety
How to spot a legitimate UK pharmacy, the warning signs of an unregulated seller, and where to report concerns.
Private vs NHS
Where NHS provision ends and private treatment begins, what each route costs you, and how eligibility differs between them.
How online providers work
The journey from questionnaire to dispatch: who reviews your answers, who writes the prescription, and who dispenses it.
Glossary
Plain-English definitions of the regulatory, clinical, and pricing terms you will meet across the comparison tables.
Medication Guides
What each medicine is, how it works, and what the evidence actually shows. Information only — none of these pages recommends a treatment.
What is Mounjaro?
Tirzepatide explained: the dual GLP-1 and GIP mechanism, what the SURMOUNT-1 trial measured, and who it is prescribed for in the UK.
What is Wegovy?
Semaglutide explained: why Wegovy and Ozempic are not the same product, what the STEP trials measured, and who it is prescribed for.
What is Saxenda?
Liraglutide explained: why a daily pen asks something different from the weekly ones, what the SCALE trials measured, and who it is prescribed for.
Dosage Guides
How each dose is stepped up, why the interval matters, and what a change of strength does to what you pay. Your own schedule comes from your prescriber.
Mounjaro Dosage Guide
The six strengths and the usual four-week steps between them, why the maximum is a ceiling rather than a target, and what a change of strength does to the price.
Wegovy Dosage Guide
The five strengths and the four-week steps up to the 2.4mg maintenance dose, why that is the strength worth comparing most carefully, and what a longer gap in treatment changes.
Saxenda Dosage Guide
The five strengths and the weekly steps that reach the maintenance dose in about five weeks, why that makes the starting-dose price barely relevant, and how a daily pen changes supply.
Side Effects
What is commonly reported, what needs urgent medical help, and where to get it. If you are unwell right now, contact a healthcare professional rather than a website.
Mounjaro Side Effects
The stomach effects most people get and when they ease, the rarer signs that need urgent help, and why a bad week after a dose increase is not automatically a reason to stop.
Wegovy Side Effects
The stomach effects most people get, why headache and hair thinning are often not connected to the medicine, and the rarer signs that need urgent help.
Saxenda Side Effects
Why a daily pen makes the difficult phase shorter but more concentrated, why low blood sugar matters more here, and the rarer signs that need urgent help.
GLP-1 Side Effects Across the Class
Start here if you want to know whether something you read applies to your pen. Most of what is reported is shared by all three, which is why switching brands is often not the fix people expect.
Comparisons
Head to head, without a verdict at the end. Which medicine suits a given person is a prescriber’s decision — these pages exist to make that conversation a better one.
Mounjaro vs Wegovy
The comparison most people search for. Why the headline weight-loss figures are not a fair race, and what genuinely separates a dual-hormone pen from a single-hormone one.
Mounjaro vs Saxenda
A weekly pen against a daily one, the widest evidence gap of any pairing here, and why comparing a price per pen against a price per month gets it wrong.
Wegovy vs Saxenda
The closest pairing: the same mechanism at two schedules. Why the newer pen is not simply a better version of the older, and why both carry a second brand name.
GLP-1 and GIP
The two hormones behind every pen on the market. Usually written as a contest, which is the wrong framing — no medicine acts on GIP alone.