Furosemide (Generic Name)
Other Names: Lasix®
Oral tablets: 20 mg, 40 mg, 80 mg
About this drug
Furosemide (fyoor-OH-sa-mide) is used to treat and prevent too much fluid in the body. It works by making you pass more urine. It is a “water pill” (loop diuretic). It is also a blood pressure lowering agent (anti-hypertensive).
Common side effects are:
- Decreased potassium level
- Increased sensitivity to sunlight
- Passing more urine at night (nocturia)
- Dizziness or lightheadedness. Be careful while taking this drug. Driving and using machines can be dangerous if you are not alert.
Rare side effects include:
- Lower back pain
- Ringing in the ears
- Dry mouth
- Extreme thirst
- Increased heart rate
If any of these side effects becomes severe or bothers you, call your doctor. Do not take over-the-counter medicine for your symptoms.
Tell your doctor or pharmacist about any prescription medicine, over-the-counter medicine, or herbal products that you are taking. He or she will check for interactions.
If you miss a dose
If you miss a medicine dose, take it as soon as you remember. If it is within 2 hours of the
time for your next dose, skip the missed dose. Take your next dose at its scheduled time, and continue your usual dosing schedule.
Do not “double up” on doses to catch up.
Your doctor may have you take a potassium supplement to prevent a decrease in your potassium levels.
How to take this medicine
If your prescription says to take this medicine once daily, take it in the morning. If you’re to take more than 1 dose each day, take the last dose before 6 p.m. This will help keep you from waking in the middle of the night to use the bathroom.
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