Lasix

Fluid Retention

You will probably be started at a single dose of 20 to 80 milligrams. If needed, the same dose can be repeated 6 to 8 hours later, or the dose may be increased. Your doctor may raise the dosage by 20 milligrams or 40 milligrams with each successive administration--each 6 to 8 hours after the previous dose--until the desired effect is achieved. This dosage is then taken once or twice daily thereafter. Your doctor should monitor you carefully using laboratory tests. The maximum daily dose is 600 milligrams.

High Blood Pressure

The usual starting dose is 80 milligrams per day divided into 2 doses. Your doctor will adjust the dosages and may add other high blood pressure medications if Lasix is not enough.

CHILDREN

The usual initial dose is 2 milligrams per 2.2 pounds of body weight given in a single oral dose. The doctor may increase subsequent doses by 1 to 2 milligrams per 2.2 pounds. Doses are spaced 6 to 8 hours apart. A child's dosage will be adjusted to the lowest needed to achieve maximum effect, and should not exceed 6 milligrams per 2.2 pounds.

Overdosage

Any medication taken in excess can have serious consequences. An overdose of Lasix can cause symptoms of severe dehydration. If you suspect an overdose, seek medical attention immediately.

• Symptoms of Lasix overdose may include:
  Dry mouth, excessive thirst, low blood pressure, muscle pain or cramps, nausea and vomiting, weak or irregular heartbeat, weakness or drowsiness