Nitroprusside Sodium
Also known as: Nitropress
> **Intensive Care Medication** * This medication is strictly for use by veterinary professionals in an Intensive Care Unit (ICU) setting. * It requires precise intravenous delivery via a specialized pump and continuous, minute-by-minute monitoring of your pet's blood pressure. * It is a life-saving drug used to rapidly stabilize pets in severe heart failure or experiencing dangerously high blood pressure crises. * Because it is so potent, the veterinary team will monitor your pet closely for any signs of low blood pressure or side effects from the medication's breakdown products.
Dosage must be set by your veterinarian for your specific pet. Never give human medication or another pet’s prescription without veterinary guidance.
What it is used for
- Hypertensive crisis (systolic arterial BP >200 mm Hg)
- Adjunctive treatment of heart failure (cardiogenic shock; fulminant pulmonary edema)
- Adjunctive treatment of heart failure
- Catastrophic pulmonary edema
- Hypertensive crisis (systolic arterial BP >200 mm Hg)
- Adjunctive treatment of heart failure (cardiogenic shock; fulminant pulmonary edema)
- Adjunctive treatment of heart failure
- Catastrophic pulmonary edema
How it is given
Possible side effects
- Profound hypotension
- Nausea
- Retching
- Restlessness
- Apprehension
- Muscle twitching
- Dizziness
- Infusion site irritation (avoid extravasation)
- Thiocyanate and cyanide toxicity (with prolonged use)
Cautions & contraindications
- Compensatory hypertension (e.g., AV shunts, coarctation of the aorta, Cushing's reflex)
- Inadequate cerebral circulation
- Emergency surgery in patients near death
- > **CRITICAL WARNING**: Must only be used in an ICU setting with continuous blood pressure monitoring. * **Organ Impairment**: Use with extreme caution in patients with hepatic insufficiency, severe renal impairment, hyponatremia, or hypothyroidism due to increased risk of thiocyanate/cyanide toxicity. * **Surgical Use**: When used for controlled hypotension during surgery, patients have less tolerance to hypovolemia, anemia, or blood loss. * **Geriatrics**: Older patients may be more sensitive to hypotensive effects. * **Pregnancy**: FDA Category C. Animal studies show adverse fetal effects. Use cautiously as a last resort when benefits clearly outweigh risks. Unknown if excreted in milk.
Drug interactions
- General Anesthetics (e.g., halothane, enflurane): May enhance the hypotensive effects of nitroprusside.
- Dobutamine: Synergistic effects (increased cardiac output and reduced wedge pressure) may result; often used together beneficially in severe heart failure.
- Other Hypotensive Agents (e.g., beta-blockers, ACE inhibitors): Patients may be more sensitive to the hypotensive effects of nitroprusside.
Frequently asked questions
What is Nitroprusside Sodium used for in pets?
> **Intensive Care Medication** * This medication is strictly for use by veterinary professionals in an Intensive Care Unit (ICU) setting. * It requires precise intravenous delivery via a specialized pump and continuous, minute-by-minute monitoring of your pet's blood pressure. * It is a life-saving drug used to rapidly stabilize pets in severe heart failure or experiencing dangerously high blood pressure crises. * Because it is so potent, the veterinary team will monitor your pet closely for any signs of low blood pressure or side effects from the medication's breakdown products.
Is Nitroprusside Sodium safe for my pet?
Dosage must be set by your veterinarian for your specific pet. Never give human medication or another pet’s prescription without veterinary guidance.
This article is for general education and is not a substitute for professional veterinary advice. If your pet is unwell, please consult a veterinarian.
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