Which class of drugs is primarily used to increase the excretion of uric acid?

The class of drugs primarily used to increase the excretion of uric acid is the antigout medication. These medications, such as probenecid, work by promoting the renal excretion of uric acid, which is beneficial in the management of gout. Gout occurs when there is an accumulation of uric acid in the body, often resulting in painful inflammation. By enhancing uric acid excretion, antigout medications help reduce the frequency and severity of gout attacks.

Other classes of drugs mentioned, like antiinfectives, antifungals, and antiemetics, are aimed at treating infections, fungal conditions, and nausea/vomiting, respectively, and do not serve the primary purpose of regulating uric acid levels in the body. Therefore, the role of antigout medications is specifically tailored to address issues related to uric acid, making them the correct answer in this context.