Velardo A, Baronti D, Pasargiklian E
Exp Clin Endocrinol. 1983 Aug;82(2):238-41. doi: 10.1055/s-0029-1210283.
Plasma cyclic AMP levels were studied in ten subjects with hyperthyroidism before and after propylthiouracilic treatment. In untreated hyperthyroid subjects the plasma cyclic AMP levels were significantly elevated but were normalized when plasma iodothyronine levels declined in the normal range.