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- Treatment of the edema associated with congestive heart failure, cirrhosis of the liver, and renal disease, including the nephrotic syndrome.
- Short-term management of ascites due to malignancy, idiopathic edema, and lymphedema.
- Short-term management of hospitalized pediatric patients, other than infants, with congenital heart disease or the nephrotic syndrome.
- Intravenous SODIUM EDECRIN (ethacrynic acid) is indicated when a rapid onset of diuresis is desired, e.g., in acute pulmonary edema, or when gastrointestinal absorption is impaired or oral medication is not practicable.
DOSAGE AND ADMINISTRATION
Dosage must be regulated carefully to prevent a more rapid or substantial loss of fluid or electrolyte than is indicated or necessary. The magnitude of diuresis and natriuresis is largely dependent on the degree of fluid accumulation present in the patient. Similarly, the extent of potassium excretion is determined in large measure by the presence and magnitude of aldosteronism.
EDECRIN (ethacrynic acid) is available for oral use as 25 mg tablets.
Dosage: To Initiate Diuresis
In Adults: The smallest dose required to produce gradual weight loss (about 1 to 2 pounds per day) is recommended. Onset of diuresis usually occurs at 50 to 100 mg for adults. After diuresis has been achieved, the minimally effective dose (usually from 50 to 200 mg daily) may be given on a continuous or intermittent dosage schedule. Dosage adjustments are usually in 25 to 50 mg increments to avoid derangement of water and electrolyte excretion.
The patient should be weighed under standard conditions before and during the institution of diuretic therapy with this compound. Small alterations in dose should effectively prevent a massive diuretic response. The following schedule may be helpful in determining the smallest effective dose.
Day 1 - 50 mg once daily after a meal
Day 2 - 50 mg twice daily after meals, if necessary
Day 3 - 100 mg in the morning and 50 to 100 mg following the afternoon or evening meal, depending upon response to the morning dose.
A few patients may require initial and maintenance doses as high as 200 mg twice daily. These higher doses, which should be achieved gradually, are most often required in patients with severe, refractory edema.
In Pediatric Patients (excluding infants, see CONTRAINDICATIONS): The initial dose should be 25 mg. Careful stepwise increments in dosage of 25 mg should be made to achieve effective maintenance.
It is usually possible to reduce the dosage and frequency of administration once dry weight has been achieved.
EDECRIN (Ethacrynic Acid) may be given intermittently after an effective diuresis is obtained with the regimen outlined above. Dosage may be on an alternate daily schedule or more prolonged periods of diuretic therapy may be interspersed with rest periods. Such an intermittent dosage schedule allows time for correction of any electrolyte imbalance and may provide a more efficient diuretic response.
The chloruretic effect of this agent may give rise to retention of bicarbonate and a metabolic alkalosis. This may be corrected by giving chloride (ammonium chloride or arginine chloride). Ammonium chloride should not be given to cirrhotic patients.
EDECRIN (ethacrynic acid) has additive effects when used with other diuretics. For example, a patient who is on maintenance dosage of an oral diuretic may require additional intermittent diuretic therapy, such as an organomercurial, for the maintenance of basal weight. The intermittent use of EDECRIN (ethacrynic acid) orally may eliminate the need for injections of organomercurials. Small doses of EDECRIN (ethacrynic acid) may be added to existing diuretic regimens to maintain basal weight. This drug may potentiate the action of carbonic anhydrase inhibitors, with augmentation of natriuresis and kaliuresis. Therefore, when adding EDECRIN (ethacrynic acid) the initial dose and changes of dose should be in 25 mg increments, to avoid electrolyte depletion. Rarely, patients who failed to respond to ethacrynic acid have responded to older established agents.
While many patients do not require supplemental potassium, the use of potassium chloride or potassium-sparing agents, or both, during treatment with EDECRIN (ethacrynic acid) is advisable, especially in cirrhotic or nephrotic patients and in patients receiving digitalis.
Salt liberalization usually prevents the development of hyponatremia and hypochloremia. During treatment with EDECRIN (ethacrynic acid) , salt may be liberalized to a greater extent than with other diuretics. Cirrhotic patients, however, usually require at least moderate salt restriction concomitant with diuretic therapy.
Intravenous SODIUM EDECRIN (ethacrynic acid) is for intravenous use when oral intake is impractical or in urgent conditions, such as acute pulmonary edema.
The usual intravenous dose for the average sized adult is 50 mg, or 0.5 to 1.0 mg per kg of body weight. Usually only one dose has been necessary; occasionally a second dose at a new injection site, to avoid possible thrombophlebitis, may be required. A single intravenous dose not exceeding 100 mg has been used in critical situations.
Insufficient pediatric experience precludes recommendation for this age group.
To reconstitute the dry material, add 50 mL of 5 percent Dextrose Injection, or Sodium Chloride Injection to the vial. Occasionally, some 5 percent Dextrose Injection solutions may have a low pH (below 5). The resulting solution with such a diluent may be hazy or opalescent. Intravenous use of such a solution is not recommended. Inspect the vial containing Intravenous SODIUM EDECRIN (ethacrynic acid) for particulate matter and discoloration before use.
The solution may be given slowly through the tubing of a running infusion or by direct intravenous injection over a period of several minutes. Do not mix this solution with whole blood or its derivatives. Discard unused reconstituted solution after 24 hours.
SODIUM EDECRIN (ethacrynic acid) should not be given subcutaneously or intramuscularly because of local pain and irritation.
Tablets EDECRIN (ethacrynic acid) , 25 mg, are white, capsule shaped, scored tablets, coded MSD 65 on one side and EDECRIN (ethacrynic acid) on the other. They are supplied as follows:
NDC 25010-205-15 in bottles of 100.
Intravenous SODIUM EDECRIN (ethacrynic acid) is a dry white material either in a plug form or as a powder. It is supplied in vials containing ethacrynate sodium equivalent to 50 mg of ethacrynic acid,
Store in a tightly closed container at 25°C (77°F); excursions permitted to 15-30°C (59-86°F) [see USP Controlled Room Temperature].
Distributed by: Aton Pharma, Lawrenceville, NJ 08648, USA . Tablets EDECRIN® (Ethacrynic Acid) manufactured for: Aton Pharma, Inc. Lawrenceville, NJ 08648, USA by: Merck and Co., Inc. West Point PA 19486 USA. Intravenous SODIUM EDECRIN® (ethacrynic acid) (Ethacrynate Sodium) manufactured for: Aton Pharma, Inc. Lawrenceville, NJ 08648, USA by: DSM Pharmaceuticals, Inc. Greenville, NC 27835, USA. Issued October 2007. FDA Rev date: 2/9/2005
Last reviewed on RxList: 7/3/2008
This monograph has been modified to include the generic and brand name in many instances.
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