Like all medicines, Mounjaro can have side effects. Common side effects include nausea, vomiting, diarrhoea, and constipation, especially in the first few weeks as your body adjusts to the medication. Less common but more serious side effects include low blood sugar (especially when combined with other diabetes medications), pancreatitis, or gallbladder problems. It is essential to work closely with a healthcare professional to manage side effects and monitor your health.