GLP-1 Medications During Ramadan: Part 1
18 February, 2026 | Holy Winter - Healthcare Writer

GLP-1 Medications During Ramadan: Part 1
Medication Management & Safety
If you're taking Mounjaro (tirzepatide) or Wegovy (semaglutide) for weight loss and planning to observe Ramadan, you're not alone. Many of our patients ask: ‘Can I safely fast while on GLP-1 medications?’
The answer is yes! with proper planning, awareness, and close monitoring.
Understanding How GLP-1s Work During Fasting
GLP-1 medications continue working 24/7, including during fasting hours. They affect your body in three key ways by appetite suppression, delayed gastric emptying and improved insulin sensitivity.
These medications don't have an ‘off switch’. The effects are continuous, which is why our guidance aims to be specific and strategic.
The Golden Rule: Injection Timing
INJECT ONLY DURING NON-FASTING HOURS – within your eating window between sunset (Iftar) and dawn (Suhoor).
The Three Safe Timing Options:
Option 1: Immediately After Iftar (1-2 hours post-meal)
- Food already in stomach
- Side effects better managed with food available
- Immediate access to fluids if needed
- May increase satiety for rest of eating window
Best for: Patients with history of severe nausea or vomiting
Option 2: Mid-Eating Window (3-4 hours after Iftar)
- No rush – enjoy Iftar meal without pressure
- Allows proper meal absorption first
- Flexible timing
- Requires staying awake later
- May reduce appetite for Suhoor
Best for: Patients with flexible schedules or who prefer later bedtimes
Option 3: After Suhoor (Immediately Post Pre-Dawn Meal)
- Maintains satiety through early fasting hours
- Allows full Suhoor intake without medication interference
- Requires early wake-up
- Medication peak occurs mid-fast when no food available
Best for: Early risers who tolerate fasting well
Choose ONE consistent time and stick to it every week. Consistency maintains stable medication levels and prevents side effects.
The Big Risk: Dehydration
While many patients worry about hunger, dehydration is actually your biggest concern when combining GLP-1 medications with fasting.
Why Dehydration Risk is So High
GLP-1 medications suppress appetite, but they also suppress thirst signals. Patients literally forget to drink. Combine this with 12-16 hours of fasting, and dehydration becomes a serious risk.
Additionally, GLP-1 side effects like nausea, vomiting, and diarrhoea accelerate fluid loss.
The Hydration Protocol
Target: 2.5L- 3.5L during eating window
This is more than the standard 6-8 glasses because you're compensating for fasting hours.
Warning Signs of Dehydration
Break your fast immediately if you experience:
- Dark yellow or amber urine
- No urination for 8+ hours
- Dizziness or light-headedness when standing
- Severe headache
- Dry mouth and lips that don't improve
- Extreme fatigue beyond normal Ramadan tiredness
- Confusion or difficulty concentrating
Critical reminder: Drink even if you don't feel thirsty. The medication masks thirst signals, so you can't rely on your body's natural cues. Set hourly reminders on your phone during the eating window.
Best Fluids to Choose are water (primary choice), coconut water (natural electrolytes, herbal teas (non-caffeinated) and low-fat milk
Limit:
- Caffeinated drinks (coffee/tea) – maximum 2-3 cups as they're dehydrating
- Sugary drinks – provide empty calories and can worsen dehydration
Hypoglycaemia: Less Common But Important
While hypoglycaemia (low blood sugar) is less frequent in non-diabetic weight loss patients compared to diabetic patients, it can occur with prolonged fasting plus GLP-1 effects.
Recognising Hypoglycaemia
Watch for these symptoms:
- Shakiness or trembling
- Sweating, even when not hot
- Sweating, even when not hot
- Rapid heartbeat or palpitations
- Severe weakness
- Irritability, confusion, or difficulty concentrating
- Dizziness or feeling faint
Note: Hunger may be blunted by the GLP-1, so don't rely on hunger as a sign.
Immediate Management
If hypoglycaemia occurs:
- Break the fast immediately – this is medically necessary
- Have 15-20g fast-acting carbohydrates:
- 3-5 dates
- 120ml fruit juice
- 3-4 glucose tablets
- Wait 15 minutes and reassess symptoms
- If symptoms persist: Have another 15-20g carbs and seek medical attention
Prevention Strategies
- Ensure adequate complex carbohydrate intake at Suhoor (covered in Part 2)
- Never skip Suhoor – this is critical when on GLP-1s
- Monitor symptoms closely, especially in Week 1 of Ramadan
- Consider dose reduction if on higher doses (Mounjaro 10mg+, Wegovy 1.7mg+)
- Keep glucose tablets handy if on higher doses
Important: The risk is LOW in non-diabetic patients, but being prepared is essential.
The Staged Iftar Approach: Preventing Severe Nausea
This is non-negotiable for GLP-1 patients. Breaking fast with a large traditional meal will cause severe nausea and vomiting due to delayed gastric emptying.
Stage 1: Initial Break (0-15 minutes)
Have:
- 2-3 dates or small fruit portion
- 250ml water or coconut water
Then WAIT 15-20 minutes before eating more
Why this matters: Provides gentle blood sugar rise, initial hydration, and allows your stomach to start the digestive process.
Stage 2: Light Meal (20-40 minutes after breaking fast)
Have:
- Clear soup or broth
- Small salad with olive oil dressing
- Palm-sized portion grilled chicken or fish
- Water or herbal tea
Why this matters: Easy-to-digest foods that provide nutrients without overwhelming the stomach that's still processing Stage 1.
Stage 3: Main Meal (1-2 hours after Iftar began)
Have:
- Lean protein: 100-150g
- Vegetables: steamed or roasted
- Complex carbs: ½-1 cup (brown rice, quinoa)
- Healthy fats: avocado, nuts, olive oil
Why this matters: By now, the stomach is ready for more substantial food. The 1-2 hour gap prevents severe nausea.
Why You Can't Skip the Waiting Periods
The GLP-1 medication has slowed your stomach's ability to empty. If you eat a full meal immediately at Iftar like you might have done before starting these medications, your stomach physically cannot handle the volume.
The result? Severe nausea, vomiting, and abdominal pain that can last hours.
The staged approach may feel unfamiliar or inconvenient, but it's the difference between comfortable eating and spending your evening feeling miserable.
When You MUST Break the Fast
Islamic principles permit breaking the fast for medical necessity. Your health comes first.
Severe Dehydration: Break Fast Immediately
Signs:
- Dark amber urine or no urination for 8+ hours
- Severe dizziness, can't stand without feeling faint
- Rapid heartbeat at rest
- Confusion or extreme weakness
Action: Break fast with water and electrolyte solution. If symptoms don't improve within 30 minutes, seek medical attention.
Hypoglycaemia: Break Fast Immediately
Signs:
- Shakiness, trembling, sweating
- Rapid heartbeat
- Severe weakness or confusion
- Feeling faint or actually fainting
Action: Have 15-20g fast-acting carbs immediately (3-5 dates, 120ml juice, glucose tablets). Recheck in 15 minutes.
Severe GI Distress: Break Fast If Persistent
Signs:
- Uncontrollable vomiting – can't keep anything down
- Severe diarrhea (multiple episodes)
- Intense abdominal pain that's worsening
- Blood in vomit or stool
Action: Break fast, take small sips of water. If symptoms continue or worsen, seek medical care.
Cardiovascular Symptoms: Break Fast & Seek Emergency Help
Signs:
- Chest pain or pressure
- Severe shortness of breath
- Irregular or very rapid heartbeat
- Numbness or weakness on one side of body
Action: Break your fast immediately, call 999 - these are medical emergencies.
No Shame, No Guilt
There is no shame or religious penalty for breaking fast when medically necessary. Islam prioritises preservation of health. You can make up missed fasting days later.
If you need to break your fast for medical reasons, consult with your imam or religious advisor for guidance on making up the day.
iQ Doctor is a registered UK pharmacy that specialises in medical remedies for weight loss (including Wegovy and Mounjaro),erectile dysfunction,hair loss support and much more. Whether you require over-the-counter relief, or prescription-only medication, the experts at iQ Doctor can assist. Please get in touch if you need any further advice.
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Reviewed By

Omar El-Gohary
The superintendent and lead pharmacist - registration number 2059792.
Omar is passionate about developing healthcare technology to empower our patients.