Hettiarachchi, H. K.Gunawardhana, S.Gunaweera, P.2024-10-012024-10-012000-12-16Proceedings and Abstract of the Annual Research Sessions, December 16, 2000, University of Peradeniya, Sri Lanka pp 133-136955-589-034-Xhttps://ir.lib.pdn.ac.lk/handle/20.500.14444/1359A retrospective study was conducted with the objective of finding out the incidence of hypothyroidism following 1311 treatment for hyperthyroid patients. All hyperthyroid patients treated with 1311 at the Nuclear Medicine Unit, Faculty of Medicine, University of Peradeniya during the period of 01.01.1997 to 28.02.1999 were selected from records at the unit. Data from 60 patients who were given radioactive iodine (with either T4 > 20 ug Idl or TSH < 0.3 mull) were analysed. Patients who developed blood concentrations of TSH > 20 mull were selected as being hypothyroid. Eighteen patients out of 60 (30%) had developed hypothyroidism during the selected period which is more than double the value shown among the western countries (6-15%)en-USPharmacologyHyperthyroidism Iodine therapy Radio activeArticle