[Compensated hypothyroidism and statin administration: the symptoms of muscle damage and muscle metabolism disorders].

Background: There is no unequivocal opinion regarding the safety of statin in patients with hypothyroidism. However, based on some new data, it can be assumed that hypothyroidism, even in a stage of compensation, may cause muscle damage in patients receiving statins. As part of this study, this hypothesis was tested, and was confirmed.
Aims: To study the possibility of muscle damage and the nature of muscle metabolism in patients with compensated hypothyroidism who takes statin.
Materials and Methods: The study is transverse and observational with the inclusion of 120 women, subdivided on three groups (n=40). The main group of patients with hypothyroidism who took statins (group 1) was compared with two control groups, including those who took statins without hypothyroidism (group 2), and who did not take statins with hypothyroidism (group 3).
Results: Patients taking statins and have compensated hypothyroidism are more likely to develop complaints of muscle pain, which are often associated with the elevation of muscle lesion markers, as well as the presence of the C allele in the SLCO1B1*5 gene (c.521T>C). In patients with compensated hypothyroidism, relative frequency of occurance of muscle pain syndrome associated with CPK elevation increases with TSH levels above 2.86 mU/L. Compensated hypothyroidism increases the possibility of development of SPM-ATP by 2.7 times.
Conclusions: Compensated hypothyroidism is not a contraindication for statin therapy. However, the presence of even compensated hypothyroidism in patients taking statins increases the possibility of the development of muscle symptoms associated with taking statins, and requires additional monitoring of the clinical and biochemical parameters of muscle metabolism (especially the level of CPK).