After taking spironolactone tablets or urine is still low can be changed to oral furosemide tablets or a combination of the two, furosemide or torasemide intravenous injection or micro-pump pumping. Spironolactone tablets are a weak potassium-preserving diuretic, if a single oral dose is ineffective, you can consider changing to oral furosemide tablets for diuresis, or in order to prevent hypokalemia, the combined use of furosemide and spironolactone for diuresis. If oral diuretics are ineffective in some patients, intravenous administration can be considered, commonly used drugs are furosemide and torasemide; if intravenous administration is still ineffective, then micro-pumps can be used to administer the drug. There are many reasons for oliguria, diuretics and their use, so be sure to follow your doctor’s instructions.