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Introduction: Serum lipid disorders are one of the important risk factors for development of coronary arterial atherosclerosis. The aim of this study was to compare the effects of the drug lovastatin and a liquid vegetable extract (dill) on blood plasma lipid levels of rats. Methods: In this experimental study, 32 mouse vistar rats weighing 250±30 grams were included and maintained at 23±1 degrees Celsius. The rats were divided into 4 groups of 8 rats each. Groups I and II were given normal and high cholesterol diet, while groups III and IV were given high cholesterol diet with either lovastatin or seed dill extract for a period of 3 weeks, respectively. At the end of study, blood samples were taken and plasma lipid levels determined by the manual method. (It is worth mentioning that ultimately 26 rats were included in the study groups). Results: Results showed that both administration of lovastatin and the seed dill extract led to a significant reduction in plasma levels of cholesterol, triglycerides, LDL and LDL/HDL, TG/HDL ratios. There was a significant reduction in the levels of LDL (P<0.001) and also a significant increase in levels of HDL (P<0.001) in both the groups. The effects on plasma triglycerides levels, LDL/HDL and TG/HDL ratios were not significant. Conclusion: Considering the results of the study, seed dill extract affects plasma lipid levels and is more effective in lowering plasma cholesterol and LDL levels as compared to lovastatin.

Keywords: Lovastatin, Seed dill extract, Atherosclerosis, Serum lipid

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