Blood Pressure Home > Effects of Lasix

Lasix® (furosemide) is a prescription medication approved to treat high blood pressure and fluid retention caused by conditions such as congestive heart failure, cirrhosis, and kidney failure.
Lasix is a type of diuretic ("water pill") and works by increasing the amount of salt and water the kidneys remove from the blood. This extra salt and water is passed out through the urine. By increasing the amount of water removed from the blood, the medication causes a decrease in blood volume. Because of these effects, Lasix can lower blood pressure and can help with water retention.
Although most people have no problems with Lasix, side effects are possible. For example, this drug can cause low potassium levels, dizziness, upset stomach, or sensitivity to the sun. In most cases, these reactions are mild and easy to treat. Serious side effects are less common.
(Click Lasix for a more in-depth look at this drug's effects, including information on how it works, general dosing guidelines, and what to know before starting treatment.)
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Last reviewed by: Kristi Monson, PharmD;
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