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Benzthiazide is used in combination with triamterene in the treatment of high blood pressure (hypertension) and swelling (edema). 

How it works

Benzthiazide belongs to a class of medication called as diuretics. It acts by increasing the excretion of electrolytes like sodium, magnesium, calcium, bicarbonate along with water and decreases potassium excretion thereby reducing the excessive body fluid.

Common side effects

Increased sensitivity to light, Diarrhoea, Dizziness, Dry mouth, Vomiting, Weakness, Increased uric acid level in blood


No medicine available

Expert advice

  • Consult a doctor before taking benzthiazide if you have diabetes, gout (pain and swelling of the small joints), liver, kidneys or pancreas disorder. 
  • You will be regularly monitored for blood electrolytes in case if you are an elderly patient or have kidney problem or during treatment with certain pain killers while taking benzthiazide.  
  • Avoid direct sun exposure during the treatment of benzthiazide, as it may cause sensitivity to light (photosensitive) and may lead to the development of rashes on the skin.
  • Seek immediate medical attention if you experience sudden wheeziness, difficulty in breathing, swelling of the eyelids, face or lips, rash or itching. 
  • Do not drive or use any machinery after taking benzthiazide as it may cause dizziness.  
  • Tell your doctor if you are pregnant, planning to become pregnant or are breastfeeding.
  • Do not take if allergic to benzthiazide or any of its ingredients.
  • Do not take if suffering from serious liver or kidney disorder, high levels of potassium or calcium in blood. 
  • Do not take if suufering from a disease of the adrenal glands causing weakness, weight loss and a deficiency of hormones in the blood (Addison’s disease).
  • Do not take if suffering from diabetic ketoacidosis (high concentrations of ketone bodies).                                                                                                                                                                                                                                                          

Content on this page was last updated on 03 October, 2016, by Dr. Varun Gupta (MD Pharmacology)