Mounjarotirzepatide
Also sold as: Mounjaro KwikPen
A once-weekly injection for type 2 diabetes that acts on two gut hormone pathways rather than one.
Quick answer
- What it is
- A dual GIP and GLP-1 receptor agonist — a once-weekly injection acting on two incretin hormone pathways involved in blood sugar and appetite.
- What it's used for
- Type 2 diabetes in adults alongside diet and exercise.
- Worth knowing
- Same day each week, with or without food, rotating injection sites. The dose is stepped up over months to limit nausea.
- Main safety point
- Nausea, and sometimes vomiting or diarrhea, are common when starting or increasing the dose. BC coverage generally requires Special Authority.
Already taking Mounjaro? Pill4Me pharmacists in Chilliwack can help.
Drug class
GIP/GLP-1 receptor agonist
Use in Canada
8,414,000 prescriptions
DIN (Canada)
02541076, Many other
What is Mounjaro?
Mounjaro (tirzepatide) is a prescription medication used in adults with type 2 diabetes to help improve blood sugar control. Patients should use it only under the direction of their prescriber.
How Mounjaro works
Tirzepatide acts on both GIP and GLP-1 receptors. These hormone pathways help regulate blood sugar after meals, support insulin release when glucose is elevated, reduce glucagon, and slow stomach emptying.
Forms and strengths
Subcutaneous injection. Current Canadian product information includes once-weekly presentations in strengths from 2.5 mg to 15 mg.
How Mounjaro is taken
Use only exactly as prescribed by your doctor or nurse practitioner. Do not self-adjust the dose. Ask your pharmacist for product-specific counselling, storage, missed-dose guidance, and injection support.
This is general information, not a dose for you. Dosing depends on the reason you are taking it, your kidney and liver function, your age, and everything else you take — follow the directions on your own label, and ask us if they differ from what you read here.
If you miss a dose
Mounjaro is once weekly. Product guidance allows a missed dose to be taken as soon as possible within 4 days (96 hours) of when it was due; after that, skip it and take the next dose on your usual day. Keep at least 72 hours between two doses. If you need to change which day of the week you inject, that can be done as long as the gap between doses is at least 72 hours — ask your pharmacist to help plan it.
Side effects
Common — usually manageable
- Nausea
- Vomiting
- Diarrhea
- Constipation
- Stomach discomfort
- Reduced appetite
Get medical help for these
- Pancreatitis symptoms such as severe persistent abdominal pain
- Gallbladder problems
- Dehydration related to ongoing vomiting or diarrhea
- Serious allergic reaction
- Possible thyroid-related warning symptoms such as a neck lump, hoarseness, or trouble swallowing
Important warnings
Do not use if you or a family member have had medullary thyroid cancer or MEN 2
Seek urgent medical attention for severe or persistent abdominal pain
Ongoing nausea, vomiting, or diarrhea can lead to dehydration
Use caution with other diabetes medications that may increase the risk of hypoglycemia
Patients who are pregnant, planning pregnancy, or breastfeeding should speak with their prescriber before use
Who should take extra care
- Personal or family history of medullary thyroid cancer
- Carries the same boxed thyroid C-cell warning as other incretin medications, and is not used with MEN 2.
- History of pancreatitis
- Discuss before starting; severe, persistent abdominal pain during treatment needs assessment.
- Severe gastrointestinal disease or gastroparesis
- Stomach emptying is slowed further and symptoms may worsen.
- Insulin or sulfonylurea users
- Those doses often need reducing to avoid low blood sugar.
- Oral contraceptives
- Slowed stomach emptying can reduce absorption around dose increases — a backup method may be advised for a period.
- Pregnancy or planning pregnancy
- Not used in pregnancy; plan ahead with your prescriber.
Who should not take it
- Personal or family history of medullary thyroid carcinoma (MTC)
- Multiple Endocrine Neoplasia syndrome type 2 (MEN 2)
- Previous serious allergic reaction to tirzepatide or any ingredient in the product
Drug interactions
Blood sugar lowering may be stronger when tirzepatide is used with insulin or sulfonylureas, so prescribers may need to adjust therapy. Because tirzepatide slows stomach emptying, it can affect absorption of some oral medications. Patients should ask their pharmacist to review their full medication list.
Commonly asked about alongside Mounjaro: Ozempic, Metformin, Jardiance.
This is not a complete list. If you take several medications, or buy anything over the counter, a pharmacist medication review is the reliable way to catch interactions that matter.
Coverage in British Columbia
Coverage for Mounjaro may change over time. As of the most recent BC PharmaCare public review material, tirzepatide (Mounjaro) was under consideration for coverage. Patients should contact Pill4Me for a live coverage check based on their plan, indication, and eligibility.
Coverage may depend on indication, PharmaCare plan and Special Authority requirements. Ask Pill4Me Pharmacy to check your coverage, or see BC PharmaCare.
Frequently asked questions
Is Mounjaro the same as Ozempic?
How often is Mounjaro used?
What side effects are most common when starting Mounjaro?
Can Mounjaro be used by everyone with diabetes?
Is Mounjaro covered in British Columbia?
Related reading
Related medications
Conditions it’s used for
Already taking Mounjaro?
Move your prescription to Pill4Me and we handle the rest — we contact your current pharmacy, and refills, reminders and free local delivery come with it.
Pill4Me Pharmacy is at 5625 Promontory Rd Unit 101, Chilliwack, BC. We deliver free to Chilliwack, Sardis, Promontory, Vedder and Yarrow, and you can reach a pharmacist directly at 604-705-3644.