Can You Take Wegovy or Mounjaro During Ramadan?

Fasting during Ramadan is one of the Five Pillars of Islam. It is a month of worship, discipline, and spiritual reset. From dawn to sunset, Muslims abstain from food and drink while increasing prayer and charity.

For those using Wegovy or Mounjaro, this raises a practical question: can you safely continue your injections while fasting?

Yes. Most people can safely continue their GLP-1 injections during Ramadan with appropriate planning and monitoring. With the right tools, you can feel well and make the most of the month without jeopardising your hard-earned progress.

This guide walks you through how to do it safely, covering timing, side effects, hydration, food choices, and the practical steps that make it work.

How GLP-1 Injections Work

Wegovy and Mounjaro are once-weekly injections. They mimic the hormones your gut makes after eating to:

• Tell your brain you are full
• Slow down how quickly food leaves your stomach
• Help keep blood sugar steady

Why does this matter for Ramadan? These medicines lower your appetite. Many people feel less hungry during fasting and are less likely to overeat at Iftar (meal to break the fast). Food from Suhoor (pre-dawn meal) stays with you longer, too, which can help your fast.

That said, there are challenges: nausea on an empty stomach, dehydration risk, and injection timing.

When to Take Your Weekly Injection

The Key Advice

Do not skip your injection because you're worried about fasting. Missing doses can slow your progress and often make side effects worse when you restart. If unsure, talk to the Medy clinical team before Ramadan begins.

Avoid increasing your dose during Ramadan. A higher dose while fasting means potential new side effects when you have less room to manage them. If possible, delay dose escalation until after Eid.

Which Day to Inject

GLP-1 users will usually pick one day a week to inject and stick with it, but during Ramadan, it is worth thinking about which day suits your routine best.

Most people feel the strongest effects 24 to 48 hours after injecting. Nausea and fatigue, if they occur, usually peak during this window.

For this reason, many prefer to inject on a Thursday or Friday evening. If side effects come, they happen over the weekend when you have time to rest. However, if you have been injecting successfully on Tuesdays for months, it is absolutely fine to keep doing that. It's important to know what works for you and to be consistent.

If you do decide to change your injection day, make sure to leave at least 48 hours between doses. For example, if you normally inject on Monday and decide to switch to Thursday, do not inject on both days in the same week. Skip your Monday dose and start fresh on Thursday.

If you get so busy that you accidentally miss a dose, inject as soon as you remember. But if more than four (Mounjaro) or five (Wegovy) days have passed, just wait until your next scheduled dose.

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Always check your patient information leaflet for the most up-to-date guidance on your specific prescription.

What Time of Day

Is taking an injection haram during fasting? The majority scholarly opinion is that non-nutritive injections do not invalidate the fast.

That aside, injecting after Iftar often works better than on an empty stomach. Having some food in your system can help settle any nausea. It also gives you the evening to drink water and manage any side effects.

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Many patients find that injecting after a light Iftar, then eating their main meal later, works well.

Medication Storage

If you are travelling to visit family for Iftar or staying away from home during Ramadan, remember that pens must be stored correctly. Keep unopened pens in the fridge. If a pen is currently in use, it can stay at room temperature (below 30°C) for up to 6 weeks for Wegovy and 30 days for Mounjaro.

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Always check the specific patient information leaflet for your prescription.

Dealing With Side Effects While Fasting

In clinical practice, we commonly see GLP-1 side effects of nausea, constipation, fatigue and sometimes headaches. During Ramadan, these can feel worse because you have less time to eat, drink, and recover.

1. Nausea

This is the side effect people worry about most during Ramadan. When your stomach is empty for long hours, nausea can feel stronger.

So what can you do when you cannot eat for 15 hours?

Ginger tea at Suhoor can ease nausea later in the day. Peppermint tea at Iftar and Suhoor works well too. When you break your fast, eat smaller portions even if you feel starving. Your stomach has been in slow mode all day, and a big meal often makes things worse. Avoid greasy, heavy, or very spicy foods in the first couple of days after your injection.

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If nausea gets severe or you start being sick, contact the Medy clinical team. If unsure whether your symptoms permit breaking the fast, consult a scholar.

2. Constipation

GLP-1 injections slow gut movement, and when you combine that with less fluid during fasting hours, constipation becomes much more likely. This is one of the most common issues during Ramadan.

Focus on fibre-rich foods at Suhoor and Iftar, as this will help draw water into your gut and support regular motions:

• Whole grains (brown rice, oats, wholemeal bread)
• Vegetables (especially leafy greens)
• Fruits (prunes, figs, and dates are particularly helpful)
• Pulses (lentils, chickpeas, beans)

Most importantly, drink plenty of water during your eating window, because staying hydrated is the best way to prevent this problem.

3. Fatigue

Some people feel more tired on GLP-1 injections, especially early in treatment, and fasting adds to this. Prioritise rest when needed and plan your daily activities according to when you feel at your best (usually shortly after Iftar).

4. Headaches

Headaches during Ramadan are common, and GLP-1 injections can add to the mix. The usual culprits are dehydration and caffeine withdrawal.

If you normally drink several cups of tea or coffee a day, cutting back suddenly can trigger withdrawal headaches. These often hit hardest in the first few days. To avoid withdrawal symptoms, the solution is not to quit caffeine cold turkey. Instead, reduce your intake gradually in the lead-up to Ramadan, or keep a small, steady amount during your eating window.

Dehydration headaches feel different and are often a dull ache that builds as the day goes on. Drinking enough between Iftar and Suhoor will help to prevent them. If headaches persist despite good hydration, paracetamol is generally safe during your eating window. Check with your local pharmacist if unsure.

Hydration: The Most Important Factor

Hydration is the single variable you control most during Ramadan. Get this right.

Mild dehydration gives you headaches and constipation. Moderate dehydration gives you dizziness. Severe dehydration stops you from safely continuing your fast.

During Ramadan, you only have a limited window to replace fluids, and in the UK, fasting can last anywhere from 12 to 18 hours, depending on the time of year.

How Much to Drink

Aim for at least two litres of water between Iftar and Suhoor.

Spread it out and sip steadily rather than gulping large amounts at once. Your body absorbs water better this way, and drinking too fast can make you feel bloated or sick.

Hydrating foods help too: watermelon, cucumber, soups, yoghurt.

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Limit tea and coffee because caffeine increases fluid loss. One cup is fine, but do not overdo it.

Electrolytes

Electrolytes also matter. When you lose fluids, you also lose salts your body needs. This can leave you feeling weak, dizzy, or crampy, even if you drink enough water. Adding an electrolyte sachet or tablet to one glass of water between Iftar and Suhoor can help. You can also get electrolytes from foods like bananas, coconut water, and soups.

One caveat: if you need to watch your salt intake due to high blood pressure, heart problems, or kidney issues, ask your doctor before adding electrolyte supplements. Some contain a lot of sodium. In that case, stick to food sources and plain water.

Warning Signs of Dehydration

Watch for dark urine, dizziness, headaches and dry mouth. If you get these during fasting hours, seek medical advice. For guidance on whether your situation permits breaking the fast, ask a scholar.

What to Eat at Iftar and Suhoor

GLP-1 injections reduce appetite, which can help you to avoid overeating at Iftar. But it also means you need to be smart about food choices. You have fewer eating hours and are consuming less overall, so every mouthful needs to count.

At Iftar

Break your fast gently with dates and water. Dates give quick energy without upsetting your stomach, and water starts the rehydration process.

Wait 15 to 20 minutes before your main meal, because this lets your stomach wake up after being empty all day. Rushing into heavy food often causes bloating and worsens nausea.

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Prioritise protein first (chicken, fish, eggs, lentils). Then build the rest of the plate around vegetables and slow-release carbs. These keep you full longer and give steady energy.

At Suhoor

Do not skip Suhoor. You might not feel hungry because of your injection, but eating before dawn helps keep your energy and blood sugar stable through the fasting day.

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Choose slow-release foods: oats, eggs, wholemeal toast, yoghurt with nuts. Avoid very salty foods, which will make you thirsty when you cannot drink.

Exercise and Taraweeh Prayers

You might think fasting means no exercise. Actually, light movement can help. It's about timing, not avoidance.

General Exercise

Light to moderate exercise is fine, but the timing matters. Working out while fasting raises the risk of dehydration and low blood sugar on these drugs.

The safest approach:

• Exercise after Iftar, once you have eaten and had some water.
• Keep it lighter than usual, especially in the first week
• Walking is ideal and counts toward your activity goals
• If you usually do gym sessions, try shorter workouts, fewer repetitions or lighter weights
• Listen to your body and stop if you feel dizzy or unwell

Some people prefer a short walk before Iftar to build an appetite. This can help if your injection has killed your hunger. Just keep it gentle and stay close to home.

Taraweeh Prayers

Taraweeh after a long fast is often tiring for everyone, injection or not. Add GLP-1s into the equation, and you might worry about not being able to complete your supplementary prayers.

Key tips:

• Eat a balanced Iftar with protein and slow-release carbs.
• Drink well between Iftar and Taraweeh. If you are praying at the mosque, make sure to take some water with you and keep taking regular sips.
• Take breaks if you need to, or sit for some of the prayer.

If you are someone who loves Taraweeh and looks forward to it all year, your GLP-1 injection does not need to take that away from you. With thoughtful preparation around food, hydration and adequate rest, many people find they can complete Taraweeh without difficulty.

Blood Sugar Considerations

If you take GLP-1 injections for weight loss and do not have diabetes, blood sugar is less of a concern. But these drugs do affect blood sugar levels, and fasting naturally lowers them too, so it is worth knowing the warning signs.

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Watch for shakiness, sweating, confusion, or feeling faint. If these happen, get medical advice. For guidance on whether your symptoms permit breaking the fast, ask a person of knowledge.

Type 2 Diabetes

If you have Type 2 diabetes and take other medications, talk to your doctor or diabetes nurse before Ramadan. Your other drugs may need adjusting. Understand how to monitor your blood sugar and ketone levels, and “sick day” rules, which you should already have agreed with your diabetes nurse. These may include checking blood sugar levels more often and knowing when to temporarily stop certain medications.

When to Seek Medical Advice

Most people can safely continue their injections through Ramadan. But some things need attention.

Severe nausea that stops you from eating or drinking during your eating window is a concern, as is vomiting more than once in 24 hours. Signs of dehydration that do not improve after Iftar need checking. Symptoms of low blood sugar require action. Any new symptom that worries you is worth a check-up.

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Do not wait until things get serious. Contact your GP or reach out to the Medy clinical team early.

A Note on Religious Exemptions

Islam has provisions for those who are unable to fast due to illness or health reasons. Depending on your situation, you may be able to make up missed fasts at a later date, or there may be other options such as paying Fidya. A person of knowledge can advise on what applies to your circumstances.

Taking a weekly injection does not automatically mean you cannot fast, and many people do so safely on these medicines every year. But if you are concerned that fasting may affect your health, seek guidance from both your healthcare team and a trusted Islamic scholar. Together, they can advise you appropriately.

Your Quick Reference Checklist

Before Ramadan

• Confirm your injection day and time works with your schedule
• If a dose increase is due, discuss delaying it until after Eid
• Stock up on ginger tea, peppermint, and fibre-rich foods
• Gradually reduce tea and coffee in the weeks leading up to the fast
• Speak to the Medy clinical team if you have any concerns

During Ramadan

• Take your injection at the same time each week, ideally after a light Iftar
• Drink at least two litres between Iftar and Suhoor
• Break your fast gently with dates and water
• Prioritise protein first. Then make sure to include vegetables and slow-release carbs.
• Do not skip Suhoor, even if you are not hungry
• Keep exercise light and timed after Iftar
• Rest when your body tells you to

Warning Signs

• Severe nausea or vomiting
• Dizziness or feeling faint
• Dark urine or dry mouth
• Shakiness or signs of low blood sugar

If any occur, get medical advice and ask a scholar about fasting rules.

Final Thoughts

Ramadan is a time for spiritual reflection and community. Taking a GLP-1 injection does not have to conflict with this. With appropriate planning, monitoring, and hydration, most people can fast safely on GLP-1 injections during Ramadan.

Preparation makes this manageable. Know how your body responds to your injection. Adjust your eating and prioritise hydration.

If you have any questions, speak with our clinical team at Medy before Ramadan begins. We’re here to help.

Ramadan Mubarak.

This article is for general information only and does not replace personal medical advice. Always talk to your prescriber or doctor about your own treatment.