It works very well to support weight loss, but like all medicines, Mounjaro can bring on side effects. Sometimes, that includes dizziness.
We know that feeling dizzy isn’t pleasant. And if it happens at the start of your treatment journey, you might feel a bit apprehensive for what’s to come.
But we want to reassure you that dizziness on Mounjaro is usually nothing to worry about—and it doesn’t mean that the medicine isn’t working. Besides, it can be easier to deal with if you understand why it happens and how to manage it. Here’s what you need to know.
How common is dizziness with Mounjaro?
It’s pretty common. Up to one in ten people might experience dizziness on Mounjaro.
Generally speaking, you’re more likely to experience Mounjaro side effects when you start the medicine or increase your dose.
How long does dizziness from Mounjaro usually last?
For most people, dizziness from Mounjaro is temporary and tends to resolve on its own as your body adapts to the medication. Typically, this side effect lasts from a few days to a couple of weeks after starting treatment or increasing the dose.
But because everyone’s different, the duration of dizziness on Mounjaro varies considerably between individuals. Some people only have brief episodes, while others might experience intermittent dizziness for several weeks.
As you become accustomed to Mounjaro, these episodes generally become less frequent and less intense, often disappearing entirely within the first month of treatment.
If dizziness is interrupting your day, reach out to a clinician for support. Making sure you’re drinking at least 2 litres of fluid per day, as well as double-checking you’re getting enough calories each day can help.
Why does Mounjaro cause dizziness?
Wondering why you feel dizzy on Mounjaro? There are a few possible explanations.
Low blood pressure
Because it can help you lose weight, Mounjaro can lower your blood pressure. While for some people, this might be good news, dizziness has been reported as a knock-on effect. In one study, it affected 4.6% of people using Mounjaro compared to 2.3% in the placebo group.
Low blood sugar (hypoglycemia)
Mounjaro works by making you feel full, and one way it does that is to stimulate the release of insulin when you eat. This also keeps your blood sugar levels in check. But if you’re taking another medicine that could also affect your blood sugar, your levels might drop too low.
Dizziness is a sign of hypoglycemia, along with sweating, confusion, feeling jittery, and more.
Dehydration
Over one in ten people on Mounjaro might experience vomiting or diarrhoea. Both of these symptoms deplete your fluids, and if you don’t drink enough water to top them up there’s a risk you’ll get dehydrated. This can make you feel dizzy.
Allergic reaction
It’s rare, but some people might have an allergic reaction to Mounjaro. This can bring on dizziness, as well as swelling of your face, lips, tongue, or throat. If you think this is happening to you, contact your doctor right away.
What should I do if I feel dizzy after taking Mounjaro?
Dizziness tends to clear up on its own. Though there are some things you can do to make yourself feel better while it’s happening.
If you can, lie down until the feeling passes. And if you do have to move around, try to be as slow and careful as possible. We wouldn’t recommend getting up or bending down suddenly, either.
If you suspect the dizziness is due to low blood sugar, a sugary drink or snack may help. Try a small glass of a non-diet fizzy drink or fruit juice, a banana or some biscuits.
How to prevent dizziness
This is a tough one, because there’s no way to predict which side effects you’ll experience on Mounjaro—nor any way to guarantee you won’t feel dizzy.
While it's not always possible to completely prevent dizziness whilst taking Mounjaro, these strategies may help reduce your risk:
Ways to Prevent Dizziness on Mounjaro
- Follow your provider's dosing instructions precisely, starting with the lowest strength and gradually increasing as directed
- Stay well-hydrated by drinking at least 2 litres of water daily
- Avoid sudden movements, especially when getting up from sitting or lying down
- Maintain regular eating patterns with balanced meals and snacks. It’s really important to ensure you’re eating enough on Mounjaro. Don’t drop lower than your daily calorie target.
- Monitor your blood sugar levels regularly if you have diabetes
- Consider taking Mounjaro in the evening if dizziness tends to occur after administration
- Avoid alcohol and coffee, which can exacerbate dizziness and dehydration
- Ensure adequate salt intake, particularly if you're also reducing your food consumption
- Wear compression stockings if orthostatic hypotension is a recurring issue
If dizziness persists or disrupts your daily life, speak to your clinician—they may recommend adjusting the dosage, timing, or reviewing other medications that could be contributing.
Side effects support at Voy
"If you're using Voy and you experience any side effects, rest assured that our expert clinicians are just a message or phone call away. They can adjust your dose, prescribe medication to ease your symptoms, or simply offer reassurance.
Everyone responds differently to weight loss treatment and we'll help you find what feels right for you."
When to seek medical help
Usually, dizziness will go away on its own. But if your symptoms get worse or don’t clear up, then you should check in with your doctor.
Sometimes dizziness can be a sign that something else is going on, so if you get any other symptoms like having trouble speaking, double or blurred vision, numbness in your face, arms, or legs, fainting, or changes to your pulse, that also calls for a doctor’s visit.
Your weight loss journey
We get that learning about a medicine’s side effects might make you feel a bit nervous to try it.
But again, with Mounjaro injections, side effects are usually nothing to worry about. And generally, dizziness with Mounjaro is pretty manageable.
As part of our weight loss programme, you’ll get one-to-one support from our team of clinicians and coaches who can answer all your questions about side effects. They’ll be right there with you throughout your journey, supporting and cheering you on. We’ll also post your weight loss medication to you each month.
Find out if you’re eligible for the programme by filling out this short quiz.
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