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.
Dears Pharmacy
Best priceSheMed
The Family Chemist
UK Meds
PillTime
Second Nature
Weightless
Dr Weightmans
Medino
Chemist4U
Morrisons Clinic
Superior Pharmacy
Simply Meds Online
West Hill Pharmacy
Habitual
WePrescribe
PostMyMeds
PrivateDoc
CheqUp
Click Pharmacy
Rowlands Pharmacy
Online Pharmacy 4U
Fulham Palace Pharmacy
South Ealing Pharmacy
The Independent Pharmacy
Welzo
Click2Pharmacy
All pharmacies GPhC registered