Mounjaro 5mg Injection

No, starting directly at Mounjaro 5mg isn't recommended. The typical starting dose is 2.5mg for the first 4 weeks to allow your body to adjust and reduce the risk of side effects. However, if you're joining Voy and have already taken at least four consecutive doses of 2.5mg—with your last dose within the past week—you may be eligible to start at 5mg, subject to clinical approval.

Weight loss plateaus on 5mg can happen for several reasons - metabolic adaptation, lack of a calorie deficit, or needing a higher dose.

Try reassessing your diet, increasing physical activity, and ensuring consistent tracking. If progress stalls, speak with your clinician about adjusting your plan.

If you’re still feeling hungry, it might mean you're ready for a higher dose - or it could be other drivers of eating habits, beyond hunger. Prioritise protein and fibre, stay well-hydrated, and practise mindful eating. Your clinician can advise whether a move to 7.5mg is appropriate.

Yes, you can stay on 5mg if you're seeing steady progress with manageable side effects. Many patients maintain long-term results at this dose. The ideal dose is the one that works for you and not necessarily the highest available.

Yes, 5mg can be used as a maintenance dose for some individuals. While higher doses are often needed during the active weight loss phase, many people transition back down to 5mg after reaching their goal weight to help maintain their progress. The ideal maintenance dose depends on your body’s needs and how well your appetite is controlled at lower doses—balancing effectiveness with minimal side effects.

If it’s been less than 4 days since your missed dose, take it as soon as you remember. If more than 4 days have passed, skip it and take your next dose on your usual day.

Never take two doses at once to make up for a missed one.

Yes. Mounjaro can interact with certain medications, especially insulin or sulfonylureas, by increasing the risk of low blood sugar. These should typically not be used together with Mounjaro. Additionally, Mounjaro may also slow down how quickly your body absorbs oral medications, which could impact their effectiveness.

Be sure to provide your clinician with a complete list of any medications you're taking so they can assess any potential interactions.

You don’t need to count clicks. The 5mg pen is pre-set to deliver the correct dose with one injection. Simply turn the dial all the way to the ‘1’ symbol, and then press and hold the button until it reaches the ‘0’ symbol in the dose window, then keep holding for 5 seconds to ensure the full dose is administered.

Read our guide on how and where to inject Mounjaro for more information.

Each Mounjaro pen delivers four doses of 0.6ml, regardless of the strength. While the concentration of the active ingredient (tirzepatide) changes depending on the dose (e.g., 2.5mg, 5mg, 7.5mg), the volume of each injection remains the same. The pens are pre-filled and designed to deliver accurate, consistent doses without the need for measuring.