
Starting Mounjaro
Your guide to 2.5mg — the first 4 weeks
The 2.5mg dose is your introduction to tirzepatide. This starting phase typically lasts 4 weeks and is designed to help your body adjust before escalating. Most patients experience mild side effects that subside within the first two weeks.
What to expect
Nausea and reduced appetite are common in the first 1–2 weeks. Eating smaller meals and staying hydrated helps. Most side effects are temporary as your body adjusts to the medication.
Getting your prescription
All pharmacies listed require a valid prescription. Most offer online consultations — some include this free of charge. Your prescriber will confirm 2.5mg is the right starting dose for you.
Saving on your first order
Several pharmacies offer first-order discounts and discount codes. Check for codes like FIRST20 or SAVE10 below. Some also waive the consultation fee on your initial order.
Quick tips
- Inject on the same day each week for consistency
- Store your pen in the fridge (2–8°C) until use
- Rotate injection sites: abdomen, thigh, or upper arm
- Don't skip the 2.5mg phase — it reduces side effects later
Best prices for this stage
Sorted by total cost including consultation fees.
The Family Chemist
Best priceSlimming Direct
UK Meds
Oxford Online Pharmacy
Pharmazon Express
Cuva Health
Weightless
Medicine Marketplace
Curely
Happy Pharmacy
NowPatient
PillTime
Ashcroft Pharmacy

Pharmica
Live Well Weight Loss
Cured Pharmacy
Dr Weightmans
Farmeci
Pharmacy Online
Click2Pharmacy
Pills2U
Lotus Weight Loss

Chemist4U
Right Angled
Well Pharmacy
E-Surgery
Superior Pharmacy
PrivateDoc
CheqUp
Boots Online Doctor

WePrescribe
West Hill Pharmacy
PostMyMeds
heySlim
Morrisons Clinic
myBMI
Phlo Clinic
Click Pharmacy
Rowlands Pharmacy
IQ Doctor

Bolt Pharmacy
Fella Health
Fulham Palace Pharmacy
South Ealing Pharmacy

HealthExpress

LloydsPharmacy Online Doctor
Simply Meds Online
The Independent Pharmacy
SheMed
Curate Health
Mayfair Weight Loss Clinic
Online Pharmacy 4U
Voy

PPRX Online Pharmacy
Juniper
London Weight Loss Clinic
Medicspot
Numan
Dr Franks
Welzo
Habitual
Pharmacy Planet
All pharmacies GPhC registered