Calcitonin serum levels in different pituitary diseases. A preliminary report

Calcitonin and prolactin serum levels in heroin addicts: study on a methadone treated group

Serum calcitonin (CT) and prolactin (PRL) levels were determined in 21 heroin addicts in hospital treatment with methadone. After withdrawal of heroin the values of CT 112.4 +/- 62.9 pg/ml, and PRL 19.1 +/- 10.1 ng/ml were both significantly higher (P less than 0.001) than in normal controls (62.2 +/- 43.8 pg/ml and 9.1 +/- 3.5 ng/ml, respectively). After withdrawal of methadone, i.e. 12 +/- 3.7 days after heroin withdrawal, CT values were 76.6 +/- 32.7 ng/ml (a significant level of P less than 0.02 towards initial values). No correlation was noted between CT and PRL values.

High serum calcitonin levels in heroin addicts

An involvement of calcitonin in the mechanism of pain perception has recently been hypothesized. In order to collect information about the relationship between this hormone and well known analgesic substances such as opioids, we have studied the serum levels of calcitonin in a group of heroin addicts, finding higher average concentrations than in normal subjects of matched age and sex. In these addicts there were no severe signs of impaired renal or hepatic function, or alterations of the serum levels of calcium and phosphate. So we think that opioids, in a direct or indirect way, can stimulate the secretion of calcitonin.