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sodium phenylacetate and sodium benzoate
What is Ammonul?
AMMONUL (sodium phenylacetate and sodium benzoate) Injection 10% per 10% (a nitrogen binding agent), is a sterile, concentrated, aqueous solution of sodium phenylacetate and sodium benzoate. The pH of the solution is between 6 and 8. Sodium phenylacetate is a crystalline, white to off-white powder with a strong, offensive odor. It is soluble in water. Sodium benzoate is a white and odorless, crystalline powder that is readily soluble in water.
Sodium phenylacetate has a molecular weight of 158.13 and the molecular formula C H NaO . Sodium benzoate has a molecular weight of 144.11 and the molecular formula C H NaO .
Each mL of AMMONUL contains 100 mg of sodium phenylacetate and 100 mg of sodium benzoate, and Water for Injection. Sodium hydroxide and/or hydrochloric acid may have been used for pH adjustment.
AMMONUL injection is a sterile, concentrated solution intended for intravenous administration via a central line only after dilution [ ].
What does Ammonul look like?
What are the available doses of Ammonul?
Injection: 10% per 10% sterile, concentrated, aqueous solution of sodium phenylacetate and sodium benzoate. (
What should I talk to my health care provider before I take Ammonul?
How should I use Ammonul?
AMMONUL is indicated as adjunctive therapy in pediatric and adult patients for the treatment of acute hyperammonemia and associated encephalopathy in patients with deficiencies in enzymes of the urea cycle. During acute hyperammonemic episodes, arginine supplementation, caloric supplementation, dietary protein restriction, hemodialysis, and other ammonia lowering therapies should be considered [
AMMONUL must be diluted with sterile 10% Dextrose Injection (D10W) before administration. The dilution and dosage of AMMONUL are determined by weight for neonates, infants and young children, and by body surface area for larger patients, including older children, adolescents, and adults (Table 1).
What interacts with Ammonul?
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What are the warnings of Ammonul?
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What are the precautions of Ammonul?
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What are the side effects of Ammonul?
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What should I look out for while using Ammonul?
What might happen if I take too much Ammonul?
Overdosage has been reported during AMMONUL treatment in urea cycle-deficient patients. All patients in the uncontrolled open-label study were to be treated with the same dose of AMMONUL. However, some patients received more than the dose level specified in the protocol. In 16 of the 64 deaths, the patient received a known overdose of AMMONUL. Causes of death in these patients included cardiorespiratory failure/arrest (6 patients), hyperammonemia (3 patients), increased intracranial pressure (2 patients), pneumonitis with septic shock and coagulopathy (1 patient), error in dialysis procedure (1 patient), respiratory failure (1 patient), intractable hypotension and probable sepsis (1 patient), and unknown (1 patient). Additionally, other signs of intoxication may include obtundation (in the absence of hyperammonemia), hyperventilation, a severe compensated metabolic acidosis, perhaps with a respiratory component, large anion gap, hypernatremia and hyperosmolarity, progressive encephalopathy, cardiovascular collapse, and death.
In case of overdose of AMMONUL, discontinue the drug and institute appropriate emergency medical monitoring and procedures. In severe cases, the latter may include hemodialysis (procedure of choice) or peritoneal dialysis (when hemodialysis is unavailable).
How should I store and handle Ammonul?
Storage and HandlingStore in a dry place at 77°F (25°C); excursions permitted to 59°F to 86°F (15°C to 30°C) [see USP Controlled Room Temperature].Keep out of the reach of children.Storage and HandlingStore in a dry place at 77°F (25°C); excursions permitted to 59°F to 86°F (15°C to 30°C) [see USP Controlled Room Temperature].Keep out of the reach of children.Storage and HandlingStore in a dry place at 77°F (25°C); excursions permitted to 59°F to 86°F (15°C to 30°C) [see USP Controlled Room Temperature].Keep out of the reach of children.AMMONUL (sodium phenylacetate and sodium benzoate) Injection 10% per 10% is supplied in a single use glass vial. NDC 62592-720-50 single use vial containing 50 mL of sodium phenylacetate and sodium benzoate injection 10% per 10%.AMMONUL (sodium phenylacetate and sodium benzoate) Injection 10% per 10% is supplied in a single use glass vial. NDC 62592-720-50 single use vial containing 50 mL of sodium phenylacetate and sodium benzoate injection 10% per 10%.
Chemical StructureNo Image found
Urea cycle disorders can result from decreased activity of any of the following enzymes:
-acetylglutamate synthetase (NAGS), carbamyl phosphate synthetase (CPS), argininosuccinate synthetase (ASS), ornithine transcarbamylase (OTC), argininosuccinate lyase (ASL), or arginase (ARG).
Sodium phenylacetate and sodium benzoate are metabolically active compounds that can serve as alternatives to urea for the excretion of waste nitrogen. Figure 2 is a schematic illustrating how the components of AMMONUL, phenylacetate and benzoate, provide an alternative pathway for nitrogen disposal in patients without a fully functioning urea cycle. Phenylacetate conjugates with glutamine in the liver and kidneys to form phenylacetylglutamine, via acetylation. Phenylacetylglutamine is excreted by the kidneys via glomerular filtration and tubular secretion. The nitrogen content of phenylacetylglutamine per mole is identical to that of urea (both contain two moles of nitrogen). Two moles of nitrogen are removed per mole of phenylacetate when it is conjugated with glutamine. Similarly, preceded by acylation, benzoate conjugates with glycine to form hippuric acid, which is rapidly excreted by the kidneys by glomerular filtration and tubular secretion. One mole of hippuric acid contains one mole of waste nitrogen. Thus, one mole of nitrogen is removed per mole of benzoate when it is conjugated with glycine
CPS = carbamyl phosphate synthetase; OTC = ornithine transcarbamylase; ASS = argininosuccinate synthetase; ASL = argininosuccinate lyase; ARG = arginase; NAGS = N-acetylglutamate synthetase
Clindamycin has been shown to have neuromuscular blocking properties that may enhance the action of other neuromuscular blocking agents. Therefore, it should be used with caution in patients receiving such agents.
Clindamycin is metabolized predominantly by CYP3A4, and to a lesser extent by CYP3A5, to the major metabolite clindamycin sulfoxide and minor metabolite N-desmethylclindamycin. Therefore inhibitors of CYP3A4 and CYP3A5 may increase plasma concentrations of clindamycin and inducers of these isoenzymes may reduce plasma concentrations of clindamycin. In the presence of strong CYP3A4 inhibitors, monitor for adverse reactions. In the presence of strong CYP3A4 inducers such as rifampicin, monitor for loss of effectiveness.
Antagonism has been demonstrated between clindamycin and erythromycin . Because of possible clinical significance, these two drugs should not be administered concurrently.
Any episode of acute symptomatic hyperammonemia should be treated as a life-threatening emergency. Uncontrolled hyperammonemia can rapidly result in brain damage or death, and prompt use of all therapies necessary, including hemodialysis, to reduce ammonia levels is essential.
Hyperammonemic coma (regardless of cause) in the newborn infant should be aggressively treated while the specific diagnosis is pursued. Hemodialysis should be promptly initiated in all newborn patients. A blood flow rate of 150 mL/min/m should be targeted (ammonia clearance [mL/min] is similar to the blood flow rate [mL/min] through the dialyzer). Clearance of ammonia is approximately ten times greater by hemodialysis than by peritoneal dialysis or hemofiltration. Exchange transfusion is ineffective in the management of hyperammonemia. Hemodialysis may be repeated until the plasma ammonia level is stable at normal or near normal levels.
Hyperammonemia due to urea cycle disorders should be managed in coordination with medical personnel experienced in metabolic disorders. Ongoing monitoring of plasma ammonia levels, neurological status, laboratory tests, and clinical response in patients receiving AMMONUL is crucial to assess patient response to treatment.
This information is obtained from the National Institute of Health's Standard Packaging Label drug database.
While we update our database periodically, we cannot guarantee it is always updated to the latest version.
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