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Abstract Title:

The risk for significant creatine kinase elevation with statins.

Abstract Source:

Am J Cardiovasc Drugs. 2010 ;10(3):187-92. PMID: 20524720

Abstract Author(s):

Ryan S Stolcpart, Kari L Olson, Thomas Delate, Jon Rasmussen, Thomas F Rehring, John A Merenich

Article Affiliation:

EPIC Systems Corporation, Madison, Wisconsin, USA.

Abstract:

BACKGROUND: The HMG-CoA reductase inhibitors (statins) are effective for reducing long-term cardiovascular morbidity and mortality in both primary and secondary prevention. The most serious adverse reaction is significant elevation of creatine kinase (CK) leading to rhabdomyolysis. The incidence of CK elevation is low in randomized, controlled trials. The rate may be higher in 'real-world', less controlled settings. Data on the risks of statin-associated rhabdomyolysis in 'real-world' practice settings are limited.

OBJECTIVE: The aim of this study was to examine the risk for CK elevation among statin users in a clinical practice setting. Potential risk factors were identified and evaluated to quantify the risk for CK elevation with statins.

METHODS: This case-control study was conducted at Kaiser Permanente Colorado. Patients with prescriptions for lovastatin or simvastatin between 1 January 1999 and 30 June 2006 were identified. Cases (n = 183), i.e. patients with a CK>or =10x the upper limit of normal (ULN) while receiving a statin during this time period, were each matched on the date of statin purchase to ten control patients (n = 1830) without CK>or =10x ULN while receiving a statin. Multivariate, conditional logistic regression was used to assess the associations between the statin, statin dose, demographic, co-morbidity, laboratory, and medication factors potentially associated with CK>or =10x ULN.

RESULTS: he mean (SD) age of patients was 64.9 (11.5) years and 56.9% were male. Overall, simvastatin use was associated with a higher likelihood for CK>or =10x ULN than lovastatin (adjusted odds ratio [OR] 4.6; 95% CI 1.1, 12.4). Using simvastatin 40 mg daily as the referent, and in the absence of interacting medications, only simvastatin 80 mg was associated with a higher likelihood for CK>or =10x ULN (OR 2.7; 95% CI 1.1, 6.9). In the presence of interacting medications, all doses of simvastatin and only lovastatin 80 mg were associated with a higher likelihood for CK>or =10x ULN.

CONCLUSION: In this study, simvastatin was associated with a higher likelihood for CK>or =10x ULN than lovastatin. High-dose simvastatin, in particular, appears to confer a greater risk than lower doses of either simvastatin or lovastatin.

Study Type : Human Study

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Sayer Ji
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