Lasix Dosage

For treating high blood pressure in adults, the recommended starting dosage of Lasix is 40 mg twice daily. The recommended starting dose for treating water retention in adults can vary between 20 mg and 600 mg. Lasix is approved for use in treating water retention (but not high blood pressure) in children and infants. Generally, the recommended starting dosage for treating water retention in children is 2 mg per kilogram per day, up to a maximum of 6 mg per kilogram per day.

An Overview of Lasix Dosages

The dose of Lasix® (furosemide) your healthcare provider recommends will vary depending on a number of factors, including:
 
  • Other medical conditions you may have
  • Other medications you may currently be taking
  • How you respond to Lasix.
     
As is always the case, do not adjust your dose unless your healthcare provider specifically instructs you to do so.
 

High Blood Pressure

The recommended starting Lasix dosage for high blood pressure is Lasix 40 mg twice daily. Based on the initial blood pressure response and/or side effects of Lasix, your healthcare provider may increase (or decrease) your dose if necessary. With each change in dosage, it may take several weeks to see the full effects of Lasix on lowering blood pressure.
 

Water Retention

The recommended dose of Lasix for fluid retention (edema) can vary between 20 mg and 600 mg daily (taken as a single dose or divided and taken more frequently). Some people will only need to take Lasix when they need it (when they are experiencing water retention). Others need to take Lasix on a daily basis.
 

Dosing for Infants and Children

Lasix is approved for treating water retention (but not high blood pressure) in children and infants. Usually, the starting dosage for infants and children is 2 mg per kilogram per day (about 0.9 mg per pound per day). The child's healthcare provider may increase the dose if needed, up to a maximum of 6 mg per kilogram (about 2.7 mg per pound).
 
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Lasix Drug Information

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