Hydrodiuril is a type of medication that is used to treat high blood pressure and fluid retention. It belongs to a class of drugs called diuretics, which help the body get rid of excess fluids by increasing the amount of urine produced. There are several synonyms for hydrodiuril, including hydrochlorothiazide, chlorthalidone, and metolazone. These drugs work by inhibiting the reabsorption of sodium and chloride ions in the kidneys, which increases the production and excretion of urine. While they are all effective in treating hypertension and edema, they may have different side effects and contraindications, so it is important to consult with a healthcare professional before taking any diuretic medication.