Sign in to your account
or
By signing in you agree to our
Terms & conditions
 and 
Privacy policy

Chlorthalidone

Written By Dr. Lipika KhuranaReviewed By Dr. Rajeev Sharma
Last updated 25 Nov 2025 | 09:34 AM (UTC)

Chlorthalidone Uses

Chlorthalidone is used for Hypertension (high blood pressure), Heart Failure, kidney stone and Edema. It treats oedema (fluid overload) associated with heart, liver, kidney or lung disease.

How Chlorthalidone works

Chlorthalidone is a diuretic which lowers blood pressure by removing extra water and certain electrolytes from the body. Over time it also relaxes blood vessels and improves blood flow.

Common side effects of Chlorthalidone

Headache, Nausea, Vomiting, Dizziness, Vertigo, Orthostatic hypotension (sudden lowering of blood pressure on standing)
Authenticity

Want to Know More

Read Our Editorial Policy

Expert advice for Chlorthalidone

  • Take it in the morning with breakfast to avoid getting up at night to urinate.
  • It makes you feel dizzy. Avoid driving and attention requiring activity until you know how it affects you.
  • Avoid alcohol intake while taking Chlorthalidone as it may increase the dizziness. 
  • It may cause a sudden drop of sodium level in blood. Avoid low sodium diet while you are taking this medication.
  • Monitor your blood pressure after starting Chlorthalidone, and notify your doctor if it does not lower down.
  • Notify your doctor if you experience dizziness, tiredness, or muscle weakness that does not go away.
  • Inform your doctor if you are pregnant, planning pregnancy or breastfeeding. 
  • Chlorthalidone helps lower blood pressure and also removes excess water from your body.
  • Take it in the morning with breakfast to avoid getting up at night to urinate.
  • It may cause dizziness in the initial days of treatment.
  • Monitor your blood pressure after starting Chlorthalidone, and notify your doctor if it does not lower down.
  • Notify your doctor if you experience dizziness, tiredness, or muscle weakness that does not go away.
  • You may be asked to get regular blood tests done to monitor your kidney function.
  • It makes you feel dizzy. Avoid driving and attention requiring activity until you know how it affects you.
  • Avoid alcohol intake while taking Chlorthalidone as it may increase the dizziness. 
  • It may cause a sudden drop of sodium level in blood. Avoid low sodium diet while you are taking this medication.
  • Inform your doctor if you are pregnant, planning pregnancy or breastfeeding. 

Frequently asked questions for Chlorthalidone

No, do not take alcohol while on treatment with Chlorthalidone. Taking alcohol with Chlorthalidone may lower your blood pressure suddenly making you feel dizzy and lightheaded.
This combination is best avoided since the two medicines may interfere with each other. However, if your doctor advises you to take both ibuprofen and Chlorthalidone, you will need to keep a regular check on your blood pressure and also monitor your kidney function tests.
Yes, Chlorthalidone may raise uric acid levels. However, the occurrence of gout due to Chlorthalidone is very rare.
No, there have been no reports of Chlorthalidone causing skin cancer. However, in rare cases, this medicine can make the skin more sensitive to sunlight than usual. If you are exposed to direct sunlight you may get skin rash, so wear protective clothing and use sunscreen.