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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.

1
TF

The Family Chemist

Best price
1-3d · Free
£139.99
Total: £139.99
Free consultationFree deliveryDiscount availableGPhC registered
15% off first order
2
SD

Slimming Direct

1-3d · Free
Free consultationFree deliveryGPhC registered
£125.00
Total: £125.00
3

UK Meds

4.51-3d
Free consultationDelivery: £4.95Discount availableGPhC registered
£157.99
Total: £157.99
Code REFER_FRIEND for 20% off
4

Oxford Online Pharmacy

4.71-3d · Free
Free consultationFree deliveryDiscount availableGPhC registered
£149.99
Total: £149.99
Code NEWSLETTER10 for 10% off
5
PE

Pharmazon Express

1-3d · Free
Free consultationFree deliveryGPhC registered
£135.00
Total: £135.00
6
CH

Cuva Health

1-3d · Free
Free consultationFree deliveryDiscount availableGPhC registered
£135.99
Total: £135.99
Code LIVE9 for % off
7
WE

Weightless

1-3d · Free
Free consultationFree deliveryDiscount availableGPhC registered
£160.00
Total: £160.00
Code GUIDED_PLAN for 15% off
8
MM

Medicine Marketplace

1-3d · Free
Free consultationFree deliveryGPhC registered
£137.00
Total: £137.00
9
CU

Curely

4.71-3d · Free
Free consultationFree deliveryGPhC registered
£139.59
Total: £139.59
10
HP

Happy Pharmacy

1-3d · Free
Free consultationFree deliveryGPhC registered
£139.99
Total: £139.99
11
NO

NowPatient

1-3d
Free consultationDelivery: £12GPhC registered
£139.99
Total: £139.99
12
PI

PillTime

1-3d · Free
Free consultationFree deliveryDiscount availableGPhC registered
£139.99
Total: £139.99
Code NY60 for % off
13
AP

Ashcroft Pharmacy

4.81-3d · Free
Free consultationFree deliveryDiscount availableGPhC registered
£140.00
Total: £140.00
Code SPRING15 for % off
14

Pharmica

4.91-3d · Free
Free consultationFree deliveryDiscount availableGPhC registered
£159.99
Total: £159.99
Code SUBSCRIBE10 for 10% off
15
LW

Live Well Weight Loss

1-3d · Free
Free consultationFree deliveryGPhC registered
£144.00
Total: £144.00
16
CP

Cured Pharmacy

3.81-3d · Free
Free consultationFree deliveryDiscount availableGPhC registered
£145.00
Total: £145.00
Code REFER15 for % off
17
DW

Dr Weightmans

1-3d · Free
Free consultationFree deliveryGPhC registered
£145.00
Total: £145.00
18
FA

Farmeci

4.61-3d · Free
Free consultationFree deliveryGPhC registered
£145.00
Total: £145.00
19
PO

Pharmacy Online

4.51-3d · Free
Free consultationFree deliveryGPhC registered
£145.00
Total: £145.00
20
CL

Click2Pharmacy

1-3d · Free
Free consultationFree deliveryGPhC registered
£145.99
Total: £145.99
21
PI

Pills2U

1-3d · Free
Free consultationFree deliveryGPhC registered
£145.99
Total: £145.99
22
LW

Lotus Weight Loss

1-3d · Free
Free consultationFree deliveryDiscount availableGPhC registered
£155.00
Total: £155.00
Code LOYALTY_5PCT for 5% off
23

Chemist4U

4.81-3d · Free
Free consultationFree deliveryGPhC registered
£148.00
Total: £148.00
24
RA

Right Angled

4.11-3d · Free
Free consultationFree deliveryDiscount availableGPhC registered
£164.99
Total: £164.99
Code SAVE 10% for 10% off
25
WP

Well Pharmacy

4.31-3d · Free
Free consultationFree deliveryGPhC registered
£149.00
Total: £149.00
26
E-

E-Surgery

4.41-3d · Free
Free consultationFree deliveryDiscount availableGPhC registered
£149.95
Total: £149.95
Code NEWPT30 for % off
27
SP

Superior Pharmacy

1-3d · Free
Free consultationFree deliveryGPhC registered
£149.99
Total: £149.99
28
PR

PrivateDoc

4.81-3d · Free
Free consultationFree deliveryGPhC registered
£157.00
Total: £157.00
29
CH

CheqUp

4.21-3d · Free
Free consultationFree deliveryGPhC registered
£159.00
Total: £159.00
30

Boots Online Doctor

4.41-3d · Free
Free consultationFree deliveryDiscount availableGPhC registered
£176.97
Total: £176.97
Code WELCOME10 for 10% off
31

WePrescribe

4.91-3d
Free consultationDelivery: £6.5GPhC registered
£159.99
Total: £159.99
32
WH

West Hill Pharmacy

1-3d · Free
Free consultationFree deliveryGPhC registered
£159.99
Total: £159.99
33
PO

PostMyMeds

1-3d · Free
Free consultationFree deliveryDiscount availableGPhC registered
£174.99
Total: £174.99
Code Promo5 for 5% off
34

heySlim

4.51-3d · Free
Free consultationFree deliveryGPhC registered
£169.00
Total: £169.00
35
MC

Morrisons Clinic

2.11-3d · Free
Free consultationFree deliveryGPhC registered
£169.00
Total: £169.00
36
MY

myBMI

4.31-3d · Free
Free consultationFree deliveryGPhC registered
£169.00
Total: £169.00
37
PC

Phlo Clinic

4.71-3d · Free
Free consultationFree deliveryGPhC registered
£169.00
Total: £169.00
38
CP

Click Pharmacy

1-3d · Free
Free consultationFree deliveryGPhC registered
£169.99
Total: £169.99
39
RP

Rowlands Pharmacy

4.31-3d · Free
Free consultationFree deliveryGPhC registered
£169.99
Total: £169.99
40

IQ Doctor

4.31-3d · Free
Free consultationFree deliveryGPhC registered
£174.99
Total: £174.99
41

Bolt Pharmacy

4.41-3d · Free
Free consultationFree deliveryDiscount availableGPhC registered
£179.00
Total: £179.00
Code Subscribe & Save for % off
42
FH

Fella Health

4.51-3d · Free
Free consultationFree deliveryGPhC registered
£179.00
Total: £179.00
43
FP

Fulham Palace Pharmacy

1-3d · Free
Free consultationFree deliveryGPhC registered
£179.00
Total: £179.00
44
SE

South Ealing Pharmacy

1-3d · Free
Free consultationFree deliveryGPhC registered
£179.00
Total: £179.00
45

HealthExpress

3.11-3d · Free
Free consultationFree deliveryGPhC registered
£179.99
Total: £179.99
46

LloydsPharmacy Online Doctor

3.21-3d · Free
Free consultationFree deliveryDiscount availableGPhC registered
£179.99
Total: £179.99
Code START30 for % off
47
SM

Simply Meds Online

4.81-3d · Free
Free consultationFree deliveryGPhC registered
£179.99
Total: £179.99
48

The Independent Pharmacy

4.71-3d
Free consultationDelivery: £2.99GPhC registered
£179.99
Total: £179.99
49
SH

SheMed

4.41-3d · Free
Free consultationFree deliveryDiscount availableGPhC registered
£229.00
Total: £229.00
Code BLUE_LIGHT_MEMBERS for 20% off
50
CH

Curate Health

1-3d · Free
Free consultationFree deliveryGPhC registered
£189.00
Total: £189.00
51
MW

Mayfair Weight Loss Clinic

4.61-3d · Free
Free consultationFree deliveryGPhC registered
£189.00
Total: £189.00
52
OP

Online Pharmacy 4U

1-3d · Free
Free consultationFree deliveryDiscount availableGPhC registered
£199.99
Total: £199.99
Code WEIGHTLOSS5 for 5% off
53
VO

Voy

4.71-3d · Free
Free consultationFree deliveryGPhC registered
£194.00
Total: £194.00
54

PPRX Online Pharmacy

4.61-3d · Free
Free consultationFree deliveryGPhC registered
£194.99
Total: £194.99
55
JU

Juniper

4.51-3d · Free
Free consultationFree deliveryGPhC registered
£199.00
Total: £199.00
56
LW

London Weight Loss Clinic

4.41-3d · Free
Free consultationFree deliveryGPhC registered
£199.00
Total: £199.00
57

Medicspot

4.41-3d · Free
Free consultationFree deliveryGPhC registered
£199.00
Total: £199.00
58

Numan

4.51-3d · Free
Free consultationFree deliveryGPhC registered
£209.00
Total: £209.00
59
DF

Dr Franks

2.71-3d · Free
Free consultationFree deliveryGPhC registered
£210.00
Total: £210.00
60
WE

Welzo

1-3d · Free
Free consultationFree deliveryGPhC registered
£225.00
Total: £225.00
61
HA

Habitual

4.51-3d · Free
Free consultationFree deliveryGPhC registered
£230.00
Total: £230.00
62

Pharmacy Planet

4.21-3d · Free
Free consultationFree deliveryGPhC registered
£384.00
Total: £384.00

All pharmacies GPhC registered