Cytra-K

CYTRA-K CRYSTALS
(potassium citrate and citric acid) for Oral Solution

DESCRIPTION

CYTRA-K CRYSTALS (potassium citrate and citric acid for oral solution) is a pleasant-tasting oral systemic alkalizer containing potassium citrate and citric acid in a sugar-free base.

Each packet of CYTRA-K CRYSTALS, when reconstituted, provides the following amounts of active ingredients :

Potassium Citrate Monohydrate 3300 mg
Citric Acid Monohydrate 1002 mg
and provides 30 mEq potassium, equivalent to 30 mEq bicarbonate (HCO₃).

Inactive Ingredients

Sodium saccharin, fruit punch flavor, and FD&C Red Dye #3.

Potassium Citrate Monohydratehas the chemical name: 1,2,3-Propanetricarboxylic acid, 2-hydroxy-,tripotassium salt, monohydrate. Its chemical structure is as follows:

Citric Acid Monohydratehas the chemical name: 1,2,3-Propanetricarboxylic acid, 2-hydroxy-, monohydrate. Its chemical structure is

INDICATIONS

CYTRA-K CRYSTALS is an effective alkalinizing agent useful in those conditions where long-term maintenance of an alkaline urine is desirable, such as in patients withuric acidand cystinecalculiof theurinary tract, especially when the administration ofsodiumsalts is undesirable or contraindicated. In addition, it is a valuableadjuvantwhen administered with uricosuric agents ingouttherapy, since urates tend to crystallize out of an acid urine. It is also effective in correcting theacidosisof certain renal tubular disorders where the administration ofpotassiumcitrate may be preferable. CYTRA-K CRYSTALS is highly concentrated, and when administered after meals and before bedtime, allows one to maintain an alkaline urinary pH around the clock, usually without the necessity of a 2 A.M. dose. CYTRA-K CRYSTALS alkalinizes the urine without producing a systemicalkalosisin recommended dosage. It is highly palatable, pleasant tasting, and tolerable, even when administered for long periods. Potassium citrate does not neutralize thegastricjuice or disturb digestion.

DOSAGE AND ADMINISTRATION

CYTRA-K CRYSTALS should be taken mixed in cool water or juice according to directions, followed by additional water or juice, if desired. Proper dilution may help prevent gastroin-testinal injury associated with the oral ingestion of concentrated potassium salt preparations.

Usual Adult Dose

CYTRA-K CRYSTALS - Contents of 1 packet reconstituted with at least 6 ounces of cool water or juice, after meals and at bedtime, or as directed by physician.

Usual Pediatric Dose

CYTRA-K CRYSTALS is not recommended for pediatric use.

Usual Dosage Range

Contents of 1 packet CYTRA-K CRYSTALS, reconstituted as directed and taken four times a day, will usually maintain a urinary pH of 6.5-7.4. To check urinary pH, HYDRION Paper (pH 6.0-8.0) or NITRAZINE Paper (pH 4.5-7.5) are available and easy to use.

HOW SUPPLIED

CYTRA-K晶体- 100包/箱(NDC60258-005-01).

Storage

Store at controlled room temperature, 15°-30°C (59°-86°F). Protect from excessive heat or freezing.

KEEP THIS PRODUCT OUT OF THE REACH OF CHILDREN. IN CASE OF ACCIDENTAL OVERDOSAGE, SEEK PROFESSIONAL ASSISTANCE OR CONTACT A POISON CONTROL CENTER IMMEDIATELY.

Call your doctor for medical advice about side effects. You may report side effects to Cypress Pharmaceutical, Inc. at 1-800-793- 2145 or FDA at 1-800-FDA-1088.

Manufactured for:CypressPharmaceutical, Inc., Morristown, NJ 07960. Revised: Sep 2016.

SIDE EFFECTS

CYTRA-K CRYSTALS is generally well tolerated without any unpleasant side effects when given in recommended doses to patients with normal renal function and urinary output. However, as with any alkalinizing agent, caution must be used in certain patients with abnormal renal mechanisms to avoid development ofhyperkalemiaor alkalosis. Potassium intoxication causes listlessness, weakness, mental confusion, tingling of extremities, and other symptoms associated with a high concentration of potassium in the serum. Periodic determinations of serum electrolytes should be carried out in those patients with renal disease in order to avoid these complications. Hyperkalemia may exhibit the following electrocardiographic abnormalities: Disappearance of the P wave, widening and slurring ofQRS complex, changes of the S-T segment, tall peaked T waves, etc.

DRUG INTERACTIONS

No Information Provided

警告

Included as part of the"PRECAUTIONS"Section

PRECAUTIONS

There have been several reports, published and unpublished, concerning nonspecific small-bowel lesions consisting ofstenosis, with or withoutulceration, associated with the administration ofenteric-coatedthiazides with potassium salts. These lesions may occur withenteric-coated potassium tablets alone or when they are used with nonenteric-coated thiazides, or certain other oral diuretics. These small-bowel lesions have caused obstruction,hemorrhage, and perforation. Surgery was frequently required and deaths have occurred. Based on a large survey of physicians and hospitals, both United States and foreign, the incidence of these lesions is low, and a causal relationship in man has not been definitely established. Available information tends to implicate enteric-coated potassium salts, although lesions of this type also occur spontaneously. Therefore, coated potassium-containing formulations should be administered only when indicated, and should be discontinued immediately if abdominal pain,distention, nausea, vomiting, orgastrointestinalbleeding occur. Large doses may cause hyperkalemia and alkalosis, especially in the presence of renal disease. Concurrent administration of potassiumcontaining medication, potassium-sparing diuretics,angiotensin-converting enzyme (ACE) inhibitors, or cardiac glycosides may lead to toxicity. Do not exceed recommended dosage. Discontinue use if adverse reactions occur.

Should be used with caution by patients with low urinary output unless under the supervision of a physician. As with all liquids containing a high concentration of potassium, patients should be directed to dilute adequately with water to minimize the possibility of gastrointestinal injury associated with the oral ingestion of concentrated potassium salt preparations; and preferably, to take each dose after meals to avoidsalinelaxativeeffect.

OVERDOSE

The administration of oral potassium salts to persons with normal excretory mechanisms for potassium rarely causes serious hyperkalemia. However, if excretory mechanisms are impaired, hyperkalemia can result (seeCONTRAINDICATIONSand警告). Hyperkalemia, when detected, must be treated immediately because lethal levels can be reached in a few hours.

Treatment

Should hyperkalemia occur, treatment measures include the following:

(1) Elimination of foods or medications containing potassium. (2) The intravenous administration of 300 to 500 mL/hr ofdextrose溶解tion (10 to 25%), containing 10 units ofinsulin/20 gm dextrose. (3) The use of exchange resins,hemodialysis, orperitoneal dialysis. In treating hyperkalemia, it should be recalled that in patients who have been stabilized on digitalis, too rapid a lowering of the plasma potassium concentration can produce digitalis toxicity.

CONTRAINDICATIONS

Severe renal impairment witholiguriaorazotemia, untreated Addison's disease, adynamia episodica hereditaria, acute dehydration, heat cramps, anuria, severe myocardial damage, and hyperkalemia from any cause. Known hypersensitivity to any ingredients in this product.

CLINICAL PHARMACOLOGY

柠檬酸钾是p的吸收和代谢otassiumbicarbonate, thus acting as a systemic alkalizer. The effects are essentially those of chlorides before absorption and those of bicarbonates subsequently. Oxidation is virtually complete so that less than 5% of the potassium citrate is excreted in the urine unchanged.

PATIENT INFORMATION

No information provided. Please refer to the警告AND PRECAUTIONSsection.