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What should I know about furosemide before taking it?

Stacy Wiegman, PharmD
Pharmacy Specialist

Furosemide (Lasix) is a powerful diuretic used to treat edema (fluid retention). It can cause your blood pressure to drop when you stand up, especially if you stand up quickly. You can manage this by standing up slowly, and if you feel dizzy or light-headed, sit back down immediately.

Furosemide may cause your body to lose potassium, so your doctor may tell you to add plenty of potassium-rich foods and beverages to your diet (bananas and orange juice, for example) or take a potassium supplement. If you have diabetes, you should know that furosemide can increase your blood sugar levels.

You may become sensitive to sunlight while taking furosemide, so it's a good idea to stay out of direct sun as much as possible.

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Important: This content reflects information from various individuals and organizations and may offer alternative or opposing points of view. It should not be used for medical advice, diagnosis or treatment. As always, you should consult with your healthcare provider about your specific health needs.