Lasix is used for treating high blood pressure or water retention (swelling) associated with congestive heart failure, liver disease, or kidney disease. Lasix may also be used for other conditions as determined by your doctor.
Lasix is a loop diuretic. Loop diuretics make the kidneys eliminate larger amounts of electrolytes (especially sodium and potassium salts) and water than normal (diuretic effect). Loop diuretics are useful for treating many conditions in which salt and water retention (eg, edema, swelling) are a problem.
This medicine may cause you to have an unusual feeling of tiredness when you begin to take it. You may also notice an increase in the amount of urine or in your frequency of urination. After you have taken the medicine for a while, these effects should lessen. In general, to keep the increase in urine from affecting your sleep:
If you are to take a single dose a day, take it in the morning after breakfast.
If you are to take more than one dose a day, take the last dose no later than 6 p.m., unless otherwise directed by your doctor.
However, it is best to plan your dose or doses according to a schedule that will least affect your personal activities and sleep. Ask your health care professional to help you plan the best time to take this medicine.
If this medicine upsets your stomach, it may be taken with meals or milk. If stomach upset (nausea, vomiting, or stomach pain) continues or gets worse, or if you suddenly get severe diarrhea, check with your doctor.
The dose of loop diuretics will be different for different patients. Follow your doctor’s orders or the directions on the label. The following information includes only the average doses of loop diuretics. If your dose is different, do not change it unless your doctor tells you to do so.
The number of tablets that you take depends on the strength of the medicine. Also, the number of doses you take each day, the time allowed between doses, and the length of time you take the medicine depend on the medical problem for which you are taking loop diuretics. To lower the amount of water in the body:
Adults — At first, 20 to 80 milligrams (mg) once a day. Then, your doctor may increase your dose as needed. Your doctor may tell you to take a dose once a day, two or three times a day, or every other day.
Children — Dose is based on body weight and must be determined by your doctor. The usual dose is 2 mg per kilogram (kg) (0.91 mg per pound) of body weight for one dose. Then, your doctor may increase your dose every six to eight hours as needed. For high blood pressure:
Adults — 40 mg two times a day. Your doctor may increase your dose.
Missed dose of Lasix:
If you miss a dose of this medicine, take it as soon as possible. However, if it is almost time for your next dose, skip the missed dose and go back to your regular dosing schedule. Do not double doses.
Storage – To store Lasix:
Keep out of the reach of children.
Store away from heat and direct light.
Do not store in the bathroom, near the kitchen sink, or in other damp places. Heat or moisture may cause the medicine to break down.
Do not keep outdated medicine or medicine no longer needed. Be sure that any discarded medicine is out of the reach of children.
Lasix Side effects:
All medicines may cause side effects, but many people have no, or minor, side effects. Check with your doctor if any of these most common side effects persist or become bothersome:
Dizziness; light headedness; or sensitivity to sunlight.
Seek medical attention right away if any of these severe side effects occur:
Severe allergic reactions (rash; hives; itching; difficulty breathing; tightness in the chest; swelling of the mouth, face, lips, or tongue); calf pain or tenderness; confusion; dark urine; decreased or persistent increased urination; drowsiness; dry mouth; fast or irregular heartbeat; fever, chills, or sore throat; hearing decrease or loss; muscle pain/cramps/weakness; restlessness; ringing in the ears; severe or persistent nausea, vomiting, or dizziness; shortness of breath; sluggishness; stomach pain; unusual bleeding or bruising; unusual thirst or hunger; unusual tiredness or weakness; vein inflammation; yellow vision; yellowing of the skin or eyes.