Nitroprusside

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Nitroprusside
Black Box Warning
Adult Indications & Dosage
Pediatric Indications & Dosage
Contraindications
Warnings & Precautions
Adverse Reactions
Drug Interactions
Use in Specific Populations
Administration & Monitoring
Overdosage
Pharmacology
Clinical Studies
How Supplied
Images
Patient Counseling Information
Precautions with Alcohol
Brand Names
Look-Alike Names

Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; Associate Editor(s)-in-Chief: Gerald Chi

Disclaimer

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Black Box Warning

See full prescribing information for complete Boxed Warning.
* Nitropress® (Sodium Nitroprusside Injection) is not suitable for direct injection. The solution must be further diluted in sterile 5% dextrose injection before infusion.
  • Nitropress can cause precipitous decreases in blood pressure. In patients not properly monitored, these decreases can lead to irreversible ischemic injuries or death. Sodium nitroprusside should be used only when available equipment and personnel allow blood pressure to be continuously monitored.
  • Except when used briefly or at low (< 2 mcg/kg/min) infusion rates, sodium nitroprusside gives rise to important quantities of cyanide ion, which can reach toxic, potentially lethal levels. The usual dose rate is 0.5-10 mcg/kg/min, but infusion at the maximum dose rate should never last more than 10 minutes. If blood pressure has not been adequately controlled after 10 minutes of infusion at the maximum rate, administration of sodium nitroprusside should be terminated immediately.
  • Although acid-base balance and venous oxygen concentration should be monitored and may indicate cyanide toxicity, these laboratory tests provide imperfect guidance.

Overview

Nitroprusside is a vasodilator that is FDA approved for the {{{indicationType}}} of hypertensive crisis and acute congestive heart failure. It is also indicated for producing controlled hypotension in order to reduce bleeding during surgery.. There is a Black Box Warning for this drug as shown here. Common adverse reactions include excessive hypotension and cyanide toxicity.

Adult Indications and Dosage

FDA-Labeled Indications and Dosage (Adult)

Hypertensive Crisis
  • Dosing Information
  • Initial dose: 0.3 μg/kg/min IV infusion, titrate every few min to desired effect.
  • Average dose: 3 μg/kg/min IV infusion
  • Maximum dose: 10 μg/kg/min IV infusion
Acute Congestive Heart Failure
  • Dosing Information
  • Initial dose: 0.3 μg/kg/min IV infusion, titrate every few min to desired effect.
  • Average dose: 3 μg/kg/min IV infusion
  • Maximum dose: 10 μg/kg/min IV infusion
Reduce Bleeding During Surgery
  • Dosing Information
  • Initial dose: 0.3 μg/kg/min IV infusion, titrate every few min to desired effect.
  • Average dose: 3 μg/kg/min IV infusion
  • Maximum dose: 10 μg/kg/min IV infusion

Avoidance of excessive hypotension

  • While the average effective rate in adult and pediatric patients is about 3 mcg/kg/min, some patients will become dangerously hypotensive when they receive NITROPRESS at this rate. Infusion of sodium nitroprusside should therefore be started at a very low rate (0.3 mcg/kg/min), with upward titration every few minutes until the desired effect is achieved or the maximum recommended infusion rate (10 mcg/kg/min) has been reached.
  • Because sodium nitroprusside’s hypotensive effect is very rapid in onset and in dissipation, small variations in infusion rate can lead to wide, undesirable variations in blood pressure. Since there is inherent variation in blood pressure measurement, confirm the drug effect at any infusion rate after an additional 5 minutes before titrating to a higher dose to achieve the desired blood pressure. Sodium nitroprusside should not be infused through ordinary I.V. apparatus, regulated only by gravity and mechanical clamps. Only an infusion pump, preferably a volumetric pump, should be used.
  • Because sodium nitroprusside can induce essentially unlimited blood-pressure reduction, the blood pressure of a patient receiving this drug must be continuously monitored, using either a continually reinflated sphygmomanometer or (preferably) an intra-arterial pressure sensor. Special caution should be used in elderly patients, since they may be more sensitive to the hypotensive effects of the drug.
  • When sodium nitroprusside is used in the treatment of acute congestive heart failure, titration of the infusion rate must be guided by the results of invasive hemodynamic monitoring with simultaneous monitoring of urine output. Sodium nitroprusside can be titrated by increasing the infusion rate until: measured cardiac output is no longer increasing, systemic blood pressure cannot be further reduced without compromising the perfusion of vital organs, or the maximum recommended infusion rate has been reached, whichever comes earliest. Specific hemodynamic goals must be tailored to the clinical situation, but improvements in cardiac output and left ventricular filling pressure must not be purchased at the price of undue hypotension and consequent hypoperfusion.
  • Table 2 below shows the infusion rates corresponding to the recommended initial and maximal doses (0.3 mcg/kg/min and 10 mcg/kg/min, respectively) for both adult and pediatric patients of various weights. This infusion rate may be lower than indicated in the table for patients less than 10 kg. Note that when the concentration used in a given patient is changed, the tubing is still filled with a solution at the previous concentration.
This image is provided by the National Library of Medicine.

Avoidance of cyanide toxicity

  • When more than 500 mcg/kg of sodium nitroprusside is administered faster than 2 mcg/kg/min, cyanide is generated faster than the unaided patient can eliminate it. Administration of sodium thiosulfate has been shown to increase the rate of cyanide processing, reducing the hazard of cyanide toxicity. Although toxic reactions to sodium thiosulfate have not been reported, the co-infusion regimen has not been extensively studied, and it cannot be recommended without reservation. In one study, sodium thiosulfate appeared to potentiate the hypotensive effects of sodium nitroprusside.
  • Co-infusions of sodium thiosulfate have been administered at rates of 5-10 times that of sodium nitroprusside. Care must be taken to avoid the indiscriminate use of prolonged or high doses of sodium nitroprusside with sodium thiosulfate as this may result in thiocyanate toxicity and hypovolemia. Incautious administration of sodium nitroprusside must still be avoided, and all of the precautions concerning sodium nitroprusside administration must still be observed.

Consideration of methemoglobinemia and thiocyanate toxicity

  • Rare patients receiving more than 10 mg/kg of sodium nitroprusside will develop methemoglobinemia; other patients, especially those with impaired renal function, will predictably develop thiocyanate toxicity after prolonged, rapid infusions. Patients with suggestive findings should be tested for these toxicities.

Off-Label Use and Dosage (Adult)

Guideline-Supported Use

There is limited information regarding Off-Label Guideline-Supported Use of Nitroprusside in adult patients.

Non–Guideline-Supported Use

Aortic Stenosis
  • Dosing Information
  • 1–3 μg/kg/min IV infusion[1]
Vasopressin-Induced Hypertension During Portosystemic Shunting in Patients with Cirrhosis
  • 1–2 μg/kg/min IV infusion[2]
Myocardial Infarction
  • Dosing Information
  • 10–33 μg/kg/min IV infusion, initially within 24 hours of onset of symptoms[3]

Pediatric Indications and Dosage

FDA-Labeled Indications and Dosage (Pediatric)

Hypertensive Crisis
  • Dosing Information
  • Initial dose: 0.3 μg/kg/min IV infusion, titrate every few min to desired effect.
  • Average dose: 3 μg/kg/min IV infusion
  • Maximum dose: 10 μg/kg/min IV infusion
Acute Congestive Heart Failure
  • Dosing Information
  • Initial dose: 0.3 μg/kg/min IV infusion, titrate every few min to desired effect.
  • Average dose: 3 μg/kg/min IV infusion
  • Maximum dose: 10 μg/kg/min IV infusion
Reduce Bleeding During Surgery
  • Dosing Information
  • Initial dose: 0.3 μg/kg/min IV infusion, titrate every few min to desired effect.
  • Average dose: 3 μg/kg/min IV infusion
  • Maximum dose: 10 μg/kg/min IV infusion

Off-Label Use and Dosage (Pediatric)

Guideline-Supported Use

There is limited information regarding Off-Label Guideline-Supported Use of Nitroprusside in pediatric patients.

Non–Guideline-Supported Use

Erythromelalgia
  • Dosing Information
  • 1–5 μg/kg/min IV infusion for 2–8 days[4]
Respiratory Distress Syndrome in the Newborn
  • Dosing Information
  • 15–20 mg/day inhalation[5]
  • 0.2–6.0 μg/kg/min IV infusion[6]

Contraindications

  • Inadequate cerebral circulation or moribund patients
  • Sodium nitroprusside should not be used to produce hypotension during surgery in patients with known inadequate cerebral circulation, or in moribund patients (A.S.A. Class 5E) coming to emergency surgery.
  • Patients with congenital (Leber’s) optic atrophy or with tobacco amblyopia have unusually high cyanide/thiocyanate ratios. These rare conditions are probably associated with defective or absent rhodanase, and sodium nitroprusside should be avoided in these patients.

Warnings

See full prescribing information for complete Boxed Warning.
* Nitropress® (Sodium Nitroprusside Injection) is not suitable for direct injection. The solution must be further diluted in sterile 5% dextrose injection before infusion.
  • Nitropress can cause precipitous decreases in blood pressure. In patients not properly monitored, these decreases can lead to irreversible ischemic injuries or death. Sodium nitroprusside should be used only when available equipment and personnel allow blood pressure to be continuously monitored.
  • Except when used briefly or at low (< 2 mcg/kg/min) infusion rates, sodium nitroprusside gives rise to important quantities of cyanide ion, which can reach toxic, potentially lethal levels. The usual dose rate is 0.5-10 mcg/kg/min, but infusion at the maximum dose rate should never last more than 10 minutes. If blood pressure has not been adequately controlled after 10 minutes of infusion at the maximum rate, administration of sodium nitroprusside should be terminated immediately.
  • Although acid-base balance and venous oxygen concentration should be monitored and may indicate cyanide toxicity, these laboratory tests provide imperfect guidance.
  • The principal hazards of NITROPRESS administration are excessive hypotension and excessive accumulation of cyanide.
  • Small transient excesses in the infusion rate of sodium nitroprusside can result in excessive hypotension, sometimes to levels so low as to compromise the perfusion of vital organs. These hemodynamic changes may lead to a variety of associated symptoms. Nitroprusside-induced hypotension will be self-limited within 1-10 minutes after discontinuation of the nitroprusside infusion; during these few minutes, it may be helpful to put the patient into a head-down (Trendelenburg) position to maximize venous return. If hypotension persists more than a few minutes after discontinuation of the infusion of NITROPRESS, NITROPRESS is not the cause, and the true cause must be sought.
  • Sodium nitroprusside infusions at rates above 2 mcg/kg/min generate cyanide ion (CN¯) faster than the body can normally dispose of it. (When sodium thiosulfate is given, the body’s capacity for CN¯ elimination is greatly increased.) Methemoglobin normally present in the body can buffer a certain amount of CN¯, but the capacity of this system is exhausted by the CN¯ produced from about 500 mcg/kg of sodium nitroprusside. This amount of sodium nitroprusside is administered in less than an hour when the drug is administered at 10 mcg/kg/min (the maximum recommended rate). Thereafter, the toxic effects of CN¯ may be rapid, serious, and even lethal.
  • The true rates of clinically important cyanide toxicity cannot be assessed from spontaneous reports or published data. Most patients reported to have experienced such toxicity have received relatively prolonged infusions, and the only patients whose deaths have been unequivocally attributed to nitroprusside-induced cyanide toxicity have been patients who had received nitroprusside infusions at rates (30-120 mcg/kg/min) much greater than those now recommended. Elevated cyanide levels, metabolic acidosis, and marked clinical deterioration, however, have occasionally been reported in patients who received infusions at recommended rates for only a few hours and even, in one case, for only 35 minutes. In some of these cases, infusion of sodium thiosulfate caused dramatic clinical improvement, supporting the diagnosis of cyanide toxicity.
  • Cyanide toxicity may manifest itself as venous hyperoxemia with bright red venous blood, as cells become unable to extract the oxygen delivered to them; metabolic acidosis (lactic acidosis); air hunger; confusion; and death. Cyanide toxicity due to causes other than nitroprusside has been associated with angina pectoris and myocardial infarction; ataxia, seizures, and stroke; and other diffuse ischemic damage.
  • Hypertensive patients, and patients concomitantly receiving other antihypertensive medications, may be more sensitive to the effects of sodium nitroprusside than normal subjects.

Precautions

  • General
  • Hepatic
  • Use caution when administering nitroprusside to patients with hepatic insufficiency.
  • When sodium nitroprusside (or any other vasodilator) is used for controlled hypotension during anesthesia, the patient’s capacity to compensate for anemia and hypovolemia may be diminished. If possible, pre-existing anemia and hypovolemia should be corrected prior to administration of NITROPRESS. Hypotensive anesthetic techniques may also cause abnormalities of the pulmonary ventilation/perfusion ratio. Patients intolerant of these abnormalities may require a higher fraction of inspired oxygen. Extreme caution should be exercised in patients who are especially poor surgical risks (A.S.A. Class 4 and 4E).
  • Laboratory Tests
  • The cyanide level assay is technically difficult, and cyanide levels in body fluids other than packed red blood cells are difficult to interpret. Cyanide toxicity will lead to lactic acidosis and venous hyperoxemia, but these findings may not be present until an hour or more after the cyanide capacity of the body’s red-cell mass has been exhausted.

Adverse Reactions

Clinical Trials Experience

There is limited information regarding Clinical Trial Experience of Nitroprusside in the drug label.

Postmarketing Experience

  • The most important adverse reactions to sodium nitroprusside are the avoidable ones of excessive hypotension and cyanide toxicity. The adverse reactions described in this section develop less rapidly and, as it happens, less commonly.
  • Sodium nitroprusside infusions can cause sequestration of hemoglobin as methemoglobin. The back-conversion process is normally rapid, and clinically significant methemoglobinemia (>10%) is seen only rarely in patients receiving NITROPRESS. Even patients congenitally incapable of back-converting methemoglobin should demonstrate 10% methemoglobinemia only after they have received about 10 mg/kg of sodium nitroprusside, and a patient receiving sodium nitroprusside at the maximum recommended rate (10 mcg/kg/min) would take over 16 hours to reach this total accumulated dose.
  • Methemoglobin levels can be measured by most clinical laboratories. The diagnosis should be suspected in patients who have received >10 mg/kg of sodium nitroprusside and who exhibit signs of impaired oxygen delivery despite adequate cardiac output and adequate arterial pO2. Classically, methemoglobinemic blood is described as chocolate brown, without color change on exposure to air.
  • When methemoglobinemia is diagnosed, the treatment of choice is 1-2 mg/kg of methylene blue, administered intravenously over several minutes. In patients likely to have substantial amounts of cyanide bound to methemoglobin as cyanmethemoglobin, treatment of methemoglobinemia with methylene blue must be undertaken with extreme caution.
  • Most of the cyanide produced during metabolism of sodium nitroprusside is eliminated in the form of thiocyanate. When cyanide elimination is accelerated by the co-infusion of thiosulfate, thiocyanate production is increased.
  • Thiocyanate is mildly neurotoxic (tinnitus, miosis, hyperreflexia) at serum levels of 1 mmol/L (60 mg/L). Thiocyanate toxicity is life-threatening when levels are 3 or 4 times higher (200 mg/L).
  • The steady-state thiocyanate level after prolonged infusions of sodium nitroprusside is increased with increased infusion rate, and the half-time of accumulation is 3-4 days. To keep the steady-state thiocyanate level below 1 mmol/L, a prolonged infusion of sodium nitroprusside should not be more rapid than 3 mcg/kg/min; in anuric patients, the corresponding limit is just 1 mcg/kg/min. When prolonged infusions are more rapid than these, thiocyanate levels should be measured daily.
  • Physiologic maneuvers (e.g., those that alter the pH of the urine) are not known to increase the elimination of thiocyanate. Thiocyanate clearance rates during dialysis, on the other hand, can approach the blood flow rate of the dialyzer.
  • Thiocyanate interferes with iodine uptake by the thyroid.
  • Abdominal pain, apprehension, diaphoresis, dizziness, headache, muscle twitching, nausea, palpitations, restlessness, retching, and retrosternal discomfort have been noted when the blood pressure was too rapidly reduced. These symptoms quickly disappeared when the infusion was slowed or discontinued, and they did not reappear with a continued (or resumed) slower infusion.
  • Other adverse reactions reported are:
Central Nervous System

Increased intracranial pressure.

Cardiovascular

Bradycardia, electrocardiographic changes, tachycardia.

Gastrointestinal

Ileus.

Hematologic

Decreased platelet aggregation.

Dermatologic

Rash.

Endocrine

Hypothyroidism.

Miscellaneous

Flushing, venous streaking, irritation at the infusion site.

Drug Interactions

  • The hypotensive effect of sodium nitroprusside is augmented by that of most other hypotensive drugs, including ganglionic blocking agents, negative inotropic agents, and inhaled anesthetics.

Use in Specific Populations

Pregnancy

Pregnancy Category (FDA):

  • Pregnancy Category C
  • Teratogenic effects
  • There are no adequate, well-controlled studies of NITROPRESS in either laboratory animals or pregnant women. It is not known whether NITROPRESS can cause fetal harm when administered to a pregnant woman or can affect reproductive capacity. NITROPRESS should be given to a pregnant woman only if clearly needed.
  • Nonteratogenic effects
  • In three studies in pregnant ewes, nitroprusside was shown to cross the placental barrier. Fetal cyanide levels were shown to be dose-related to maternal levels of nitroprusside. The metabolic transformation of sodium nitroprusside given to pregnant ewes led to fatal levels of cyanide in the fetuses. The infusion of 25 mcg/kg/min of sodium nitroprusside for one hour in pregnant ewes resulted in the death of all fetuses. Pregnant ewes infused with 1 mcg/kg/min of sodium nitroprusside for one hour delivered normal lambs.
  • According to one investigator, a pregnant woman at 24 weeks gestation was given sodium nitroprusside to control gestational hypertension secondary to mitral valve disease. Sodium nitroprusside was infused at 3.9 mcg/kg/min for a total of 3.5 mg/kg over 15 hours prior to delivery of a 478 gram stillborn infant without any obvious anomalies. Cyanide levels in the fetal liver were less than 10 mcg/mL. Toxic levels have been reported to be more than 30-40 mcg/mL. The mother demonstrated no cyanide toxicity.
  • The effects of administering sodium thiosulfate in pregnancy, either by itself or as a co-infusion with sodium nitroprusside, are completely unknown.


Pregnancy Category (AUS):

  • Australian Drug Evaluation Committee (ADEC) Pregnancy Category C

There is no Australian Drug Evaluation Committee (ADEC) guidance on usage of Nitroprusside in women who are pregnant.

Labor and Delivery

There is no FDA guidance on use of Nitroprusside during labor and delivery.

Nursing Mothers

  • It is not known whether sodium nitroprusside and its metabolites are excreted in human milk. Because many drugs are excreted in human milk and because of the potential for serious adverse reactions in nursing infants from sodium nitroprusside, a decision should be made whether to discontinue nursing or to discontinue the drug, taking into account the importance of the drug to the mother.

Pediatric Use

  • Efficacy in the pediatric population was established based on adult trials and supported by the dose-ranging trial (Study 1) and an open label trial of at least 12 hour infusion at a rate that achieved adequate MAP control (Study 2) with pediatric patients on sodium nitroprusside. No novel safety issues were seen in these studies in pediatric patients.

Geriatic Use

There is no FDA guidance on the use of Nitroprusside with respect to geriatric patients.

Gender

There is no FDA guidance on the use of Nitroprusside with respect to specific gender populations.

Race

There is no FDA guidance on the use of Nitroprusside with respect to specific racial populations.

Renal Impairment

There is no FDA guidance on the use of Nitroprusside in patients with renal impairment.

Hepatic Impairment

There is no FDA guidance on the use of Nitroprusside in patients with hepatic impairment.

Females of Reproductive Potential and Males

There is no FDA guidance on the use of Nitroprusside in women of reproductive potentials and males.

Immunocompromised Patients

There is no FDA guidance one the use of Nitroprusside in patients who are immunocompromised.

Administration and Monitoring

Administration

  • Dilution to proper strength for infusion
  • Depending on the desired concentration, the solution containing 50 mg of Nitropress must be further diluted in 250-1000 mL of sterile 5% dextrose injection. The diluted solution should be protected from light, using the supplied opaque sleeve, aluminum foil, or other opaque material. It is not necessary to cover the infusion drip chamber or the tubing.
  • Verification of the chemical integrity of the product
  • Sodium nitroprusside solution can be inactivated by reactions with trace contaminants. The products of these reactions are often blue, green, or red, much brighter than the faint brownish color of unreacted Nitropress. Discolored solutions, or solutions in which particulate matter is visible, should not be used. If properly protected from light, the freshly diluted solution is stable for 24 hours.
  • No other drugs should be administered in the same solution with sodium nitroprusside.

Monitoring

Blood Pressure and Urine Output
  • Because sodium nitroprusside can induce essentially unlimited blood pressure reduction, the blood pressure of a patient receiving this drug must be continuously monitored, using either a continually reinflated sphygmomanometer or (preferably) an intra-arterial pressure sensor. Special caution should be used in elderly patients, since they may be more sensitive to the hypotensive effects of the drug.
  • When sodium nitroprusside is used in the treatment of acute congestive heart failure, titration of the infusion rate must be guided by the results of invasive hemodynamic monitoring with simultaneous monitoring of urine output.

IV Compatibility

There is limited information regarding IV Compatibility of Nitroprusside in the drug label.

Overdosage

Acute Overdose

Signs and Symptoms

Description

Management

Description

Chronic Overdose

There is limited information regarding Chronic Overdose of Nitroprusside in the drug label.

Pharmacology

Template:Px
Sodium nitroprusside (anhydrous)Sodium nitroprusside
Systematic (IUPAC) name
disodium pentacyano(nitroso)irondiuide
Identifiers
CAS number 15078-28-1
ATC code C02DD01
PubChem 11953895
DrugBank DB00325
Chemical data
Formula Template:OrganicBox atomTemplate:OrganicBoxTemplate:OrganicBoxTemplate:OrganicBoxTemplate:OrganicBoxTemplate:OrganicBoxTemplate:OrganicBoxTemplate:OrganicBoxTemplate:OrganicBoxTemplate:OrganicBoxTemplate:OrganicBoxTemplate:OrganicBoxTemplate:OrganicBoxTemplate:OrganicBox atomTemplate:OrganicBox atomTemplate:OrganicBox atomTemplate:OrganicBoxTemplate:OrganicBoxTemplate:OrganicBoxTemplate:OrganicBoxTemplate:OrganicBoxTemplate:OrganicBoxTemplate:OrganicBox 
Mol. mass 261.918
SMILES eMolecules & PubChem
Synonyms SNP
Physical data
Density 1.72 g/cm³
Solubility in water 100 mg/mL (20 °C)
Pharmacokinetic data
Bioavailability 100% (Intravenous)
Metabolism By haemoglobin being converted to cyanmethaemoglobin and cyanide ions
Half life <2 minutes (3 days for thiocyanate metabolite)
Excretion Renal (100%; as thiocyanate)
Therapeutic considerations
Licence data

US

Pregnancy cat.

C(AU) C(US)

Legal status

Prescription Only (S4)(AU) ?(CA) POM(UK) [[Prescription drug|Template:Unicode-only]](US)

Routes Intravenous

Mechanism of Action

There is limited information regarding Nitroprusside Mechanism of Action in the drug label.

Structure

There is limited information regarding Structure of Nitroprusside in the drug label.

Pharmacodynamics

There is limited information regarding Pharmacodynamics of Nitroprusside in the drug label.

Pharmacokinetics

There is limited information regarding Pharmacokinetics of Nitroprusside in the drug label.

Nonclinical Toxicology

=Carcinogenesis, Mutagenesis, and Impairment of Fertility

  • Animal studies assessing sodium nitroprusside’s carcinogenicity and mutagenicity have not been conducted. Similarly, sodium nitroprusside has not been tested for effects on fertility.

Clinical Studies

There is limited information regarding Clinical Studies of Nitroprusside in the drug label.

Condition1

Description

How Supplied

There is limited information regarding Nitroprusside How Supplied in the drug label.

Storage

There is limited information regarding Nitroprusside Storage in the drug label.

Images

Drug Images

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Package and Label Display Panel

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Patient Counseling Information

There is limited information regarding Patient Counseling Information of Nitroprusside in the drug label.

Precautions with Alcohol

  • Alcohol-Nitroprusside interaction has not been established. Talk to your doctor about the effects of taking alcohol with this medication.

Brand Names

  • Nitropress®[7]

Look-Alike Drug Names

Drug Shortage Status

Price

References

The contents of this FDA label are provided by the National Library of Medicine.

  1. Ikram, H. (1992-02-01). "Hemodynamic effects of nitroprusside on valvular aortic stenosis". The American Journal of Cardiology. 69 (4): 361–366. ISSN 0002-9149. PMID 1734649. Unknown parameter |coauthors= ignored (help)
  2. Sirinek, K. R. (1989-01). "Simultaneous infusion of nitroglycerin and nitroprusside to offset adverse effects of vasopressin during portosystemic shunting". American Journal of Surgery. 157 (1): 33–37. ISSN 0002-9610. PMID 2491934. Unknown parameter |coauthors= ignored (help); Check date values in: |date= (help)
  3. Yusuf, S. (1988-05-14). "Effect of intravenous nitrates on mortality in acute myocardial infarction: an overview of the randomised trials". Lancet. 1 (8594): 1088–1092. ISSN 0140-6736. PMID 2896919. Unknown parameter |coauthors= ignored (help)
  4. Stone, J. D. (1997-05). "Nitroprusside treatment of erythromelalgia in an adolescent female". The Annals of Pharmacotherapy. 31 (5): 590–592. ISSN 1060-0280. PMID 9161655. Unknown parameter |coauthors= ignored (help); Check date values in: |date= (help)
  5. Palhares, D. B. (1998). "Endotracheal inhalatory sodium nitroprusside in severely hypoxic newborns". Journal of Perinatal Medicine. 26 (3): 219–224. ISSN 0300-5577. PMID 9773383. Unknown parameter |coauthors= ignored (help)
  6. Benitz, W. E. (1985-01). "Use of sodium nitroprusside in neonates: efficacy and safety". The Journal of Pediatrics. 106 (1): 102–110. ISSN 0022-3476. PMID 3917495. Unknown parameter |coauthors= ignored (help); Check date values in: |date= (help)
  7. "Nitropress (sodium nitroprusside) injection, solution, concentrate".
  8. "http://www.ismp.org". External link in |title= (help)


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