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Mounjaro is considered a safe medication for people living with type 2 diabetes and obesity.
Still, Mounjaro’s safety profile includes a combination of common side effects, rarer side effects, contraindications (a specific reason for not taking the medication), and precautions for use.
So, while Mounjaro is a safe medication for most people, like all medications, it comes with risks, and these will be evaluated by your doctor or pharmacist before you receive a Mounjaro prescription.
A randomised controlled trial investigating the impact of tirzepatide (the drug in Mounjaro) on weight loss showed that 68.9% of people on the highest dose of the medication experienced more than one adverse event, the most common being nausea and diarrhoea.
However, only 8.5% of participants stopped taking the medication due to the severity of their side effects.
So, over 90% of participants taking Mounjaro could stay on the medication as they either experienced no side effects or the side effects were mild enough to manage and not impact their quality of life.
However, as Mounjaro is a new medication, we don’t have any follow-up data to understand any potential long-term effects of the medication.
If you’re living with type 2 diabetes or obesity and decide to take Mounjaro, ensure you report any side effects you experience to your healthcare team.
Here’s a list of the most common and mild side effects of Mounjaro:
- Nausea
- Vomiting
- Diarrhoea
- Abdominal pain
- Decreased appetite
Here’s a list of rarer, more serious side effects of Mounjaro (many of these have been associated with drugs similar to tirzepatide, like liraglutide and are listed for Mounjaro as precautionary measures):
- Pancreatitis: Inflammation of the pancreas, which can be serious and require medical attention if symptoms such as severe abdominal pain occur.
- Hypoglycemia: Especially when used in combination with other diabetes medications like sulfonylureas or insulin, tirzepatide can increase the risk of low blood sugar.
- Kidney problems: Dehydration resulting from gastrointestinal side effects can lead to kidney issues, including kidney failure in severe cases.
- Thyroid tumours: In animal studies, drugs that work similarly to tirzepatide have been associated with thyroid tumours. It’s unclear if this risk applies to humans, but caution is advised.
Here’s a list of contraindications and precautions of Mounjaro:
- History of Medullary Thyroid Carcinoma (MTC) or Multiple Endocrine Neoplasia syndrome type 2 (MEN 2): Patients with these conditions should not use tirzepatide.
- Gallbladder disease: Caution is advised due to the potential for gallbladder-related issues.
- History of pancreatitis: Tirzepatide should be used with caution in patients with a history of pancreatitis.