Muscle Cramps on GLP-1 Medications: Common Causes and What Helps
Some people on GLP-1 medications notice leg cramps at night, tight calves after a walk, or muscle twitches they didn't have before. Muscle cramps are not one of the main side effects listed for these medications, but several changes that come with them can make cramps more likely. The good news is that most of those causes are easy to address.
Common causes
Lower fluid intake
Feeling full makes it easy to drink less, and food normally supplies a good share of your water. Even mild dehydration can make muscles more prone to cramping.
Fewer electrolytes
Sodium, potassium, and magnesium help muscles contract and relax normally. Smaller meals mean less of all three. Drinking large amounts of plain water without replacing electrolytes can add to the imbalance.
Diarrhea or vomiting
Digestive side effects are common on GLP-1s. Diarrhea was reported by 30% of adults in the Wegovy trials, and both diarrhea and vomiting pull fluid and electrolytes out of the body. See diarrhea on GLP-1 medications.
Exercise while eating less
Strength training and walking are important on a GLP-1, but working out with less fuel and fluid can bring on cramps during or after activity.
Other medications and conditions
Diuretics, some blood pressure medications, and conditions like low iron or nerve problems can also play a role, so mention cramps to your provider if they are frequent.
What helps
- Drink steadily through the day, not just when you feel thirsty, and a little more around exercise.
- Replace electrolytes on days you are eating very little, sweating, or have had diarrhea or vomiting. Our guide to sodium, potassium, and magnesium explains each one.
- Eat potassium and magnesium foods you can tolerate, like bananas, potatoes, yogurt, beans, spinach, nuts, and seeds.
- Stretch gently, especially your calves before bed and after workouts.
- Fuel your workouts. A small snack with some protein beforehand can help.
- Protect your muscle. Adequate protein and strength training help keep muscles healthy. See how to maintain muscle on a GLP-1.
When to see a doctor
Contact your healthcare provider if cramps are severe, frequent, or not improving with fluids and electrolytes, or if they come with muscle weakness, swelling, very dark urine, or a racing or irregular heartbeat. People with kidney or heart conditions should check with their provider before increasing sodium or potassium.
Where Alula fits
Alula is a daily drink mix designed for people on GLP-1 medications. Each stick includes electrolytes (350 mg sodium, 220 mg potassium, and 130 mg magnesium) to support hydration and normal muscle function, along with 1,500 mg of calcium HMB to support muscle retention.* It also includes 2 g of collagen peptides, 2 g of PHGG fiber, a Bacillus coagulans probiotic (about 2 billion CFU), 250 mg of ginger root extract, and a full panel of vitamins and minerals. Because it is a drink, it also adds to your daily fluids. It is not a treatment for muscle cramps. Learn more about Alula.
*These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease. Alula is a dietary supplement, not a GLP-1 medication. Talk with your healthcare provider before starting any new supplement.
Frequently asked questions
Do GLP-1 medications cause muscle cramps?
Cramps are not one of the main side effects listed for GLP-1 medications. They are more often linked to lower fluid and electrolyte intake, digestive side effects, and exercising while eating less.
Does magnesium help muscle cramps?
Magnesium is involved in normal muscle function, and intake often drops when you eat less. Research on magnesium for cramps is mixed, so it works best as part of overall hydration and nutrition. Check with your provider before starting supplements.
Why do I get leg cramps at night?
Night cramps are common in general and can be more likely when you are low on fluids or electrolytes. Hydrating through the day and stretching your calves before bed may help.