What should I know about chlorothiazide before taking it?

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You should not take chlorothiazide if you have allergies to the ingredients in chlorothiazide or any sulfonamides, cannot pass urine, or use ketanserin or dofetilide. Pregnant and breastfeeding women should discuss with their doctors the risks of taking chlorothiazide before using it, as should anyone over 65. Many other drugs can interfere with chlorothiazide. Diabetics may find it interferes with the beneficial effects of insulin and causes high blood sugar. Other possible side effects include dizziness, fatigue and light sensitivity. Alcohol, high temperatures, fever, and exercise will increase dizziness. Talk to your doctor about any conditions or procedures you have or have had in the past, including: nerve surgery; kidney problems; liver problems; asthma; parathyroid disorders; diabetes; lupus; high cholesterol or high blood lipids; low blood pressure; gout; and high or low levels of any minerals in your blood. Also tell your doctor about current medications and supplements you are taking before taking chlorothiazide.