2-Thiouracil is a thiolated uracil derivative that is a known antihyperthyroid agent. In vitro
2-Thiouracil is an established antithyroid drug and an extensively investigated agent for the early detection and targeting of metastatic melanotic melanoma. In addition, 2-Thiouracil is also a selective inhibitor of neuronal nitric oxide synthase antagonising tetrahydrobiopterin-dependent enzyme activation and dimerization.