Sub-agent Sub-agent Sub-agent (Sub-agency) is a real estate term in the United States and Canada describing the relationship which a real estate broker and his/her agents have with a buyer of a business, home, or property. Lasting until the early 1990s, the broker provided a conventional full-service, commission-based brokerage relationship under a signed listing agreement only with a seller, thus creating an agency relationship with fiduciary obligations under common law in most of the US and Canada. The seller was then a client of the broker. However, no such agency relationship existed with the buyer, and the broker's agents helped the
Antithyroid agent Antithyroid agent An antithyroid agent is a hormone antagonist acting upon thyroid hormones. The main antithyroid drugs are carbimazole (in the UK), methimazole (in the US), and propylthiouracil/PTU. A less common antithyroid agent is potassium perchlorate. In Graves' disease, treatment with antithyroid medications must be given for six months to two years, in order to be effective. Even then, upon cessation of the drugs, the hyperthyroid state may recur. Side effects of the antithyroid medications include a potentially fatal reduction in the level of white blood cells. A randomized control trial testing single dose treatment for Graves' found methimazole achieved