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Related Experiment Videos

Muscle pain associated with daptomycin.

Shailaja R Veligandla1, Kathy R Louie, Mark A Malesker

  • 1Alegent Health Immanuel Medical Center, Omaha, NE, USA. himachalrao@yahoo.com

The Annals of Pharmacotherapy
|September 16, 2004
PubMed
Summary

Daptomycin can cause muscle pain (myopathy) even with normal creatine kinase (CK) levels. This case highlights the need for clinical awareness of potential daptomycin-induced myopathy without significant CK elevation.

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Area of Science:

  • Pharmacology
  • Infectious Diseases
  • Clinical Toxicology

Background:

  • Daptomycin is a lipopeptide antibiotic effective against Gram-positive bacteria, including methicillin-resistant Staphylococcus aureus (MRSA).
  • Potential adverse effects include myopathy and elevated creatine kinase (CK) levels, though often associated with significant CK elevation.
  • Current guidelines recommend discontinuing daptomycin if myopathy occurs with CK >1000 U/L or CK >10 times normal without symptoms.

Observation:

  • A patient with MRSA endocarditis developed myalgia and myositis during daptomycin treatment.
  • The patient experienced muscle pain despite only a minor elevation in CK levels (492 U/L).
  • Symptoms resolved after daptomycin discontinuation, suggesting a possible drug-related adverse event.

Findings:

Related Experiment Videos

  • Daptomycin-induced myopathy can manifest without pronounced creatine kinase elevation.
  • Clinical presentation of myopathy may precede or occur independently of significant laboratory abnormalities.
  • An objective causality assessment indicated a possible link between daptomycin and the observed myopathy.

Implications:

  • Clinicians should consider daptomycin-induced myopathy in patients presenting with muscle pain, even with normal or minimally elevated CK levels.
  • This case underscores the importance of vigilant monitoring for adverse effects beyond standard laboratory markers.
  • Recognition of this presentation can prevent delayed diagnosis and ensure appropriate patient management.