Purpose: To determine if patients treated with HMG-CoA reductase inhibitors have their LDL cholesterol levels at or below the levels recommended by the National Cholesterol Education Program (NCEP) and if patients on these medications are monitored for potential toxicity.
Patients and methods: Ninety patients from the VA Medical Center in San Francisco were randomly selected in this retrospective analysis. All patients were taking a HMG-CoA reductase inhibitor as monotherapy for treatment of high blood cholesterol for a minimum of 1 year. Medical charts and laboratory and pharmacy computer databases were utilized to gather information regarding the patients' medical history, treatment history, relevant laboratory tests, and medication refill profile.
Results: The majority of patients, 73%, were secondary prevention patients. Only 33% of the 90 subjects met the LDL cholesterol goal recommended by the NCEP. For the secondary prevention patients, only 24% met goal LDL. Even when the stringency of the NCEP guidelines was reduced by 20% (goal LDL < 120 mg/dL), 50% of the secondary prevention patients were still inadequately treated. Only 2 of the 90 patients were on maximal dosage regimens. Sixty-seven percent of patients had annual lipid panels and 49% had annual liver panels. Forty-five percent of patients followed by nonphysicians met goal LDL while only 29% and 31% of patients followed by attending physicians and residents/fellows met goal LDL, respectively. In addition, patients followed by nonphysicians were monitored more closely for efficacy and toxicity of the medications.
Conclusions: Based on the current NCEP recommendations, patients on monotherapy with HMG-CoA reductase inhibitors are often inadequately treated. Only 33% of the patients evaluated at our institution were at or below the NCEP recommended LDL cholesterol levels and less than half of the patients were adequately monitored for hepatotoxicity.