Polythiazide is a prescription medication that is commonly used to treat high blood pressure. It is a thiazide diuretic that works by reducing the amount of salt and water in the body to lower blood pressure. There are several synonyms for polythiazide, including polythiazidum, polymetahydroxynaphthalenesulfonate, and polythiazide-sodium. These synonyms are used to refer to the same active ingredient and can be used interchangeably. It is important to note that polythiazide should only be taken as prescribed by a healthcare provider to avoid any potential side effects. If you have questions about the medication or its synonyms, talk to your doctor or pharmacist.