How long do Mounjaro side effects last?

The most common side effects of Mounjaro include headache, vomiting, nausea, stomach ache, and low blood sugar. Almost all of these side effects are seen when the body is adapting to the new weight loss injection.

The side effects start to fade once your body gets used to the new weight loss medication. Your body adapts to the new weight loss treatment in about 4 weeks. However, it may differ from person to person.