Changes in Blood Pressure after the First Dose of Calcitonin (Elcatonin)

Abstract

We had found previously that calcitonin treatment (elcatonin once a week for 10 weeks) results in significant decreases in blood pressure. The aim of the present study was to determine whether these effects were due to a cumulative effect of elcatonin or could be elicited by treatment with a single dose. To this end, we recruited 62 patients (eight men, 54 women; mean age 83 years; range 67-101 years) with a chief complaint of lower back pain to the present study and examined changes in blood pressure following administration of the first dose of elcatonin. All subjects in the study had been hospitalized either at our institution or an affiliated hospital. After acute phase symptoms had settled, subjects received 1 U (1mL), i.m., elcatonin S20. Blood pressure was measured the day before the first scheduled treatment and on the day of treatment. Both systolic and diastolic blood pressure decreased from 2 h after administration, and dropped significantly 4 and 6 h after administration. Therefore, elcatonin decreased blood pressure without first having to be accumulated in the body. There are several possible explanations for the results, including effects mediated by changes in concentrations of calcitonin gene-related peptide and calcium ions, as well as involvement of the parasympathetic nervous system. In conclusion, calcitonin inhibits bone resorption and pain, lowers blood pressure, and is easy to use in elderly patients who exhibit age-related increases in blood pressure.