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Abstract
Transcutaneous electric nerve stimulation (TENS) analgesic effect is produced by β‐endorphin release which interacts with captopril, a drug used for arterial hypertension treatment that affects thyroid hormone secretion, mainly 3,5,3′‐triiodothyronine (T3). To study a correlation between TENS (9 Hz × 30 min), captopril and T3, Mus musculus mice received nociceptive stimulation (writhe‐induced model) and were treated with captopril (1 mg/kg) and TENS and the T3 serum level was evaluated. As a result, T3 serum level rose slightly after TENS application and captopril separately but increased more after captopril alone. In addition, the antinociceptive effect produced by electric stimulation was enhanced by captopril with a high statistical significance (p < 0.001). Additionally, the TENS–captopril treatment increased T3 serum level to values 117.7% higher than control groups, reinforcing the supposed link between neuroelectric stimulation, captopril, and T3 secretion.