What side effects may I notice from receiving Chlorothiazide?

Side effects that you should report to your doctor or health care professional as soon as possible:

-allergic reactions (skin rash, itching or hives; swelling of the face, lips, or tongue)
-heartbeat rhythm changes (trouble breathing; chest pain; dizziness; fast, irregular heartbeat; feeling faint or lightheaded, falls)
-kidney injury (trouble passing urine or change in the amount of urine)
-low blood pressure (dizziness; feeling faint or lightheaded, falls; unusually weak or tired)
-redness, blistering, peeling, or loosening of the skin, including inside the mouth
Side effects that usually do not require medical attention (report to your doctor or health care professional if they continue or are bothersome):

-diarrhea
-high blood sugar (increased hunger, thirst or urination; unusually weak or tired, blurry vision)
-increased thirst
-loss of appetite
-muscle cramps, pain
-unusual sweating
-vomiting

This list may not describe all possible side effects for Chlorothiazide. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.