ISSN 1671-5411 CN 11-5329/R
Ran Zhang, Cai-Yi Lu, Wei Gao, Ya Huang, Yu-Ling Gao, Qiong-Xiang Yang, Hai-Hong Ran. Rhabdomyolysis induced by simvastatin-diltiazem interaction in unrecognized hypothyroidism. J Geriatr Cardiol 2010; 7(2): 126-128.
Citation: Ran Zhang, Cai-Yi Lu, Wei Gao, Ya Huang, Yu-Ling Gao, Qiong-Xiang Yang, Hai-Hong Ran. Rhabdomyolysis induced by simvastatin-diltiazem interaction in unrecognized hypothyroidism. J Geriatr Cardiol 2010; 7(2): 126-128.

Rhabdomyolysis induced by simvastatin-diltiazem interaction in unrecognized hypothyroidism

  • Publish Date: 2010-06-28
  • Simvastatin, a 3-hydroxy-3-methylglutaryl coenzyme A reductase inhibitor, is widely prescribed to patients with hypercholesteremia and its muscular toxicity has been widely reported. The metabolism of simvastatin depends on the enzymic activity of cytochrome P450 3A4 (CYP3A4) and inhibitors of CYP3A4 can result in clinical events by interacting with simvastatin. Diltiazem is a moderate inhibitor of CYP3A4, which is known to increase the serum concentration of simvastatin. Here we report a patient with unrecognized hypothyroidism who had been stable for more than one year on low-dose simvastatin therapy of hypercholesteremia and rhabdomyolysis occurred with the addition of diltiazem. This is one of scanty reports of rhabdomyolysis induced by simvastatindiltiazem drug interaction, especially in hypothyroid patient. This case reminds the clinicians that although diltiazem as a moderate CYP3A4 inhibitor can be used cautiously with small doses of CYP3A4-dependent statins (eg, simvastatin), these two commonly used drugs should be avoided in hypothyroid patient.
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      沈阳化工大学材料科学与工程学院 沈阳 110142

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