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potassium phosphate (KH2PO4)
Indications:
- hypophosphatemia, hypokalemia
- potassium & phosphate replacement
- acidification of urine
- lowering urinary Ca+2 concentration
- prevention of calcium stones
- reduce odor & rash caused by ammoniacal urine
Dosage:
1) IV dosing only for K+ replacement
2) give dose based on potassium & phosphate levels
3) as urinary tract agent:
- 1000 mg dissolved in 6-8 oz of water QID (with meals & QHS) Tablets, Na+ free: 500 mg = 3.67 meq K+
Injection: 3 mmol phosphate & 4.4 meq K+/mL (15 mL) 224 mg monobasic (K2HPO4) & 236 mg dibasic (KH2PO4)/mL must be diluted prior to administration
Adverse effects:
1) common (> 10%)
- diarrhea, nausea/vomiting, epigastric pain, flatulence
2) less common (1-10%)
- bradycardia, hyperkalemia, local tissue necrosis with extravasation, weakness, dyspnea
3) uncommon (< 1%)
- chest pain, arrhythmia, edema, confusion, tetany, pain of extremities, hyperphosphatemia*, hypocalcemia*, alkalosis, abdominal pain, weight gain, throat pain, decreased urine output, phlebitis, paresthesias, paralysis, bone pain, arthralgia, weakness of extremities, dyspnea, thirst
* phosphate toxicity can result in hypocalcemic tetany
Drug interactions:
- increased effect of digoxin
General
potassium supplement
urinary acidifier
Database Correlations
PUBCHEM cid=24506
References
- Drug Information & Medication Formulary, Veterans Affairs,
Central California Health Care System, 1st ed., Ravnan et al
eds, 1998
Department of Veterans Affairs, VA National Formulary
- Kaiser Permanente Northern California Regional Drug
Formulary, 1998
- Deprecated Reference
Component-of
alanine/arginine/aspartate/calcium chloride/glucose/glutamate/glycine/histidine/isoleucine/leucine/lysine/magnesium chloride/methionine/phenylalanine/potassium chloride/potassium phosphate/proline/serine/sodium chloride/threonine/tryptophan/tyrosine/valine
alanine/arginine/calcium chloride/glucose/glycine/histidine/isoleucine/leucine/lysine/magnesium chloride/methionine/phenylalanine/potassium phosphate/proline/serine/sodium acetate/sodium chloride/threonine/tryptophan/tyrosine/valine
alanine/arginine/calcium chloride/glucose/glycine/histidine/isoleucine/leucine/magnesium chloride/methionine/phenylalanine/potassium phosphate/proline/serine/sodium acetate/sodium chloride/threonine/tryptophan/tyrosine/valine
alanine/arginine/glucose/glycine/histidine/isoleucine/leucine/lysine/magnesium chloride/methionine/phenylalanine/potassium phosphate/proline/sodium acetate/sodium chloride/threonine/tryptophan/tyrosine/valine
alanine/arginine/glucose/glycine/histidine/isoleucine/leucine/lysine/magnesium chloride/potassium phosphate/sodium chloride/threonine/tryptophan/tyrosine/valine
alanine/arginine/glycine/histidine/isoleucine/leucine/lysine/magnesium chloride/methionine/phenylalanine/potassium phosphate/proline/sodium acetate/sodium chloride/threonine/tryptophan/tyrosine/valine
glucose/lactate/magnesium chloride/phosphate/potassium chloride/potassium phosphate/sodium chloride
glucose/lactate/magnesium chloride/phosphate/potassium chloride/potassium phosphate/sodium phosphate
glucose/lactate/potassium chloride/potassium phosphate/sodium chloride
glucose/lactate/potassium chloride/potassium phosphate/sodium phosphate
glucose/magnesium chloride/phosphate/potassium chloride/potassium phosphate/sodium acetate
glucose/magnesium chloride/potassium chloride/potassium phosphate/sodium acetate
glucose/magnesium chloride/potassium chloride/potassium phosphate/sodium acetate/sodium chloride/sodium phosphate
glucose/magnesium chloride/potassium chloride/potassium phosphate/sodium chloride/sodium lactate
glucose/magnesium chloride/potassium chloride/potassium phosphate/sodium chloride/sodium lactate/sodium phosphate
glucose/phosphate/potassium phosphate/sodium acetate/sodium chloride
glucose/potassium chloride/potassium phosphate/sodium chloride/sodium lactate
magnesium chloride/potassium chloride/potassium phosphate/sodium acetate/sodium chloride/sodium gluconate/sodium phosphate
magnesium chloride/potassium chloride/potassium phosphate/sodium acetate/sodium chloride/sodium phosphate
magnesium sulfate/potassium chloride/potassium phosphate/sodium chloride/sodium phosphate
potassium phosphate/sodium phosphate