| Summary: | <p class="Default"><strong>Background</strong>: Iodine supplementation with salt as a carrier was introduced in Sri Lanka in 1995. Literature from elsewhere suggest that there is an increase in hyperthyroidism after the initiation of such programmes.</p><p class="Default"><strong>Objectives</strong>: To identify weather iodination precipitated an exacerbation of hyperthyroidism in the Central Province of Sri Lanka</p><p class="Default"><strong>Methods</strong>: Four-hundred-and-eight consecutive patients with hyperthyroidism seen over a period of thirty one years in a General Surgical Clinic at Teaching Hospital, Peradeniya were reviewed.</p><p class="Default"><strong>Results</strong>: The prevalence of secondary hyperthyroidism increased after iodination. No change in the demography and presentation of simple diffuse toxic goiter was observed.</p><p><strong>Conclusions</strong>: Physicians must be aware of this increased incidence of hyperthyroidism after iodination and need to be vigilant of the need to control it, in view of its complications.</p>
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