Nausea with Mounjaro

A common side effect of Mounjaro weight loss treatment is Nausea (feeling sick), and although this side effect is common, studies show that it improves significantly after 4 weeks of treatment. 

The feeling of sickness is sometimes followed by vomiting (being sick). This is caused by the way Mounjaro weight loss injections work which is to make your tummy feel full. This is actually one of the ways the medicine works to help weight loss -  when you feel full and satisfied, you will eat less.

Mounjaro also works by slowing down digestion, causing food to stay in the stomach longer than usual, which can bring on more feelings of nausea and bloating.

The good news is that clinical trials show that most of these uncomfortable side effects reduce dramatically after the first 4 weeks of treatment.

To help manage nausea associated with starting Mounjaro injections, consider these top tips:

Choose low-fat food

When feeling or being sick, stick to a simple low-fat diet when you do eat. Choose options like rice, crackers, and toast. Take small bites, chew thoroughly, and eat slowly to help you feel better. Keep a record of which foods work best for you.

You can find out more about eating a low-fat diet through the NHS here.

Keep upright after eating

Try not to lie down immediately after meals, as this can make nausea worse by promoting food reflux (when food flows back up from your tummy to your mouth). Instead, engage in gentle, upright activities after meals, such as light household chores, to aid digestion.

Stay hydrated

There is an increased risk of dehydration during the first weeks of Mounjaro because the medicine blocks feelings of hunger and thirst. 

Enjoy hydrating foods like soup, fruits, and vegetables to prevent dehydration and nausea. Remember to stay hydrated throughout the day, taking small sips of water if necessary.

Read more here to find which foods are the best for hydration.

Get fresh air

Spending time outdoors in the fresh air can help nausea and generally help you feel better.

Take a gentle walk in nature to help you relax, distract yourself from discomfort and promote digestion through gentle exercise.

Consider short-term antacid use

If you still feel sick after following these tips, consider using an over-the-counter anti-sickness and anti-acid medication like Omeprazole for a week or two. Consult with a healthcare professional to double-check that this is safe for you.

If the sickness is still bad and you’re not sure whether you want to continue with Mounjaro, contact our trained healthcare team for further advice.

Visit the Mounjaro weight loss aid main page for full product information.