Statin Medications and the Risk of Gynecomastia

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Nelson Vergel

Founder, ExcelMale.com
Abstract
Objective
Case reports have suggested an increased risk of gynecomastia with HMG‐CoA reductase inhibitors (i.e. statins). A recent meta‐analysis also found that statins decrease circulating testosterone levels in men. We investigated whether statin use was associated with an increased risk of gynecomastia.

Design
Case control study.

Patients
A cohort of patients from a random sample of 9,053,240 US subjects from the PharMetrics Plus™ health claims database from 2006 to 2016 was created.

Measurements
New cases of gynecomastia requiring at least two ICD‐9 codes were identified from the cohort and matched to 10 controls by follow‐up time and age using density‐based sampling. Rate ratios (RRs) for past users of statins were computed using conditional logistic regression adjusting for alcoholic cirrhosis, hyperthyroidism, testicular cancer, Klinefelter syndrome, obesity, hypogonadism, hyperprolactinemia and use of spironolactone, ketoconazole, H2 receptor antagonists (H2 blockers), risperidone, testosterone and androgen deprivation therapy.

Results
Our cohort included 6,147 cases of gynecomastia and 61,470 corresponding matched controls. The adjusted RR for current, recent and past statin use with respect to gynecomastia was 1.19 (1.04‐1.36), 1.38 (1.15‐1.65) and 1.20 (1.03‐1.40) respectively.

Conclusions
Statin use is associated with an increased risk of developing gynecomastia. Clinicians should be cognizant of this effect and educate patients accordingly.

Reference
 
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