Need help or have questions about your order? Call 510-991-8265Questions about your order? Call 510-991-8265

Sign InShop GLPs
Shop GLPs

Muscle Cramping on GLP-1: What Could Be Causing It

By
Published Updated Last reviewed
5 linked public sourcesEditorial, sourcing, and corrections policy

At a glance

  • Listed as a common reaction / Muscle cramps do not appear in the Wegovy or Foundayo common-reaction tables [1][2]
  • What the labels do record / Nausea, vomiting, diarrhea, constipation, sometimes severe [1][2]
  • Labeled consequence of fluid loss / Acute kidney injury due to volume depletion [1][2]
  • Muscle symptoms from another medicine / Statin-associated muscle symptoms reported in 7-29% of registry and observational populations [3]
  • Evaluating true weakness / Examination plus electrolyte, thyroid-stimulating hormone and creatine kinase tests may help [5]

Does a GLP-1 drug itself cause muscle cramps?

In adults taking Wegovy 2.4 mg for weight reduction, nausea occurred in 44% versus 16% on placebo, diarrhea in 30% versus 16%, vomiting in 24% versus 6% and constipation in 24% versus 11% [1]. Foundayo 17.2 mg produced nausea in 35%, vomiting in 24%, diarrhea in 25% and constipation in 24%, against 10%, 4%, 11% and 9% on placebo [2]. The Foundayo label says these reactions were more frequent during dose escalation and decreased over time [2].

Muscle cramps are not listed in the Wegovy table (reactions in 2% or more of treated adults) or the Foundayo table (5% or more) [1][2]. That does not show how often cramps occurred or rule out cramps in someone taking these drugs.

What the labels say about fluid loss

Wegovy warns of acute kidney injury due to volume depletion and says to monitor renal function in patients reporting reactions that could lead to volume depletion [1]. The Foundayo label reports acute kidney injury, in some cases requiring hemodialysis, and states that most events occurred in patients with gastrointestinal reactions causing dehydration such as nausea, vomiting or diarrhea; monitoring is advised especially during starting and dose escalation, and severe gastrointestinal reactions were reported in about 3% of treated patients versus 1% on placebo [2].

Other explanations worth considering

Statins are one. A European Atherosclerosis Society consensus panel reports statin-associated muscle symptoms in 7-29% of people in registries and observational studies, while statin myopathy with a significant rise in creatine kinase affects 1 in 1,000 to 1 in 10,000 people on standard doses [3].

A review of muscle weakness in adults notes that it occurs in about 5% of U.S. adults aged 60 and older, with neurologic, rheumatologic, endocrine and medication-related causes among the possibilities, and that true weakness has to be separated from fatigue and pain-limited movement by examination; electrolyte, thyroid-stimulating hormone and creatine kinase testing may help [5].

Frequently asked questions

Does semaglutide cause muscle cramps?
Muscle cramps are not among the reactions in the Wegovy label's adverse-reaction table. The common ones are nausea, diarrhea, vomiting and constipation [1].
What should be considered when cramps start on a GLP-1 drug?
Vomiting or diarrhea during treatment is one thing to weigh; the Foundayo label says most reported kidney injury occurred in patients with nausea, vomiting or diarrhea leading to dehydration [2]. Another medicine, particularly a statin, is also worth reviewing: muscle symptoms were reported in 7-29% of statin users in registry and observational studies [3].
Which tests help with muscle weakness?
When the symptom is true muscle weakness rather than a cramp, an examination can help separate it from fatigue or pain-limited movement. Electrolyte, thyroid-stimulating hormone and creatine kinase tests may also help evaluate weakness [5].
Can fluid loss on a GLP-1 drug cause kidney problems?
Acute kidney injury due to volume depletion is a labeled warning for Wegovy [1], and the Foundayo label says most reported cases occurred in patients with nausea, vomiting or diarrhea leading to dehydration [2].

References

  1. U.S. National Library of Medicine, DailyMed. Wegovy injection and tablets prescribing information. Wegovy injection and tablets label
  2. U.S. National Library of Medicine, DailyMed. Foundayo (orforglipron) tablets prescribing information. Foundayo (orforglipron) tablets label
  3. Stroes ES, Thompson PD, Corsini A, Vladutiu GD, Raal FJ, Ray KK, et al. Statin-associated muscle symptoms: impact on statin therapy-European Atherosclerosis Society Consensus Panel Statement on Assessment, Aetiology and Management. Eur Heart J. 2015;36(17):1012-22. Statin-associated muscle symptoms: impact on statin therapy-European Atherosclerosis Society Consensus Panel Statement on Assessment, Aetiology and Management
  4. U.S. National Library of Medicine, DailyMed. Zepbound injection (tirzepatide) prescribing information. Zepbound injection (tirzepatide) label
  5. Larson ST, Wilbur J. Muscle Weakness in Adults: Evaluation and Differential Diagnosis. Am Fam Physician. 2020;101(2):95-108. Muscle Weakness in Adults: Evaluation and Differential Diagnosis
Evidence overview for Muscle Cramping on GLP-1: What Could Be Causing It