Heart Health High Blood Pressure Treatment Print Sodium Nitroprusside for Hypertension Treatment Medically reviewed by facebook linkedin Medically reviewed by Richard N. Fogoros, MD on November 17, 2019 Richard N. Fogoros, MD, is a retired professor of medicine and board-certified internal medicine physician and cardiologist. He is Verywell's Senior Medical Advisor. Learn about our Medical Review Board Richard N. Fogoros, MD on November 17, 2019 Written by Written by Craig O. Weber, MD Craig O. Weber, MD, is a board-certified occupational specialist who has practiced for over 36 years. Learn about our editorial policy Craig O. Weber, MD High Blood Pressure Overview Symptoms Causes Diagnosis Treatment Coping Woman checking blood pressure in living room. Hero Images/ GettyImages Sodium nitroprusside is a powerful anti-hypertension medicine that is only used in certain situations when blood pressure must be immediately and dramatically reduced. For example, patients who are experiencing a hypertensive emergency or very high blood pressure following heart or blood vessel surgery may be given sodium nitroprusside, which has a trade name of Nitropress. In addition to treating hypertension, nitroprusside is used to treat other conditions such as congestive heart failure and also to maintain low blood pressure during certain surgeries. Sodium Nitroprusside Administration Because it can only be administered intravenously, the use of sodium nitroprusside is restricted to the hospital setting. In addition, sodium nitroprusside can cause large and rapid blood pressure decreases that require careful monitoring. How Sodium Nitroprusside Works Sodium nitroprusside belongs to a class of drugs known as NO-releasing agents because it works by releasing nitric oxide. Like all other drugs in that class, sodium nitroprusside works by relaxing blood vessels. Once in the body, sodium nitroprusside is quickly broken down into nitric oxide, a powerful vasodilator. This nitric oxide works as a vasodilator, causing the muscles surrounding blood vessels to relax, allowing the blood vessels themselves to expand. As the blood vessels expand, blood pressure drops. The breakdown of sodium nitroprusside to nitric oxide happens very quickly, so there is virtually no delay between administration of the drug and blood pressure reduction. Along with its blood pressure-reducing actions, sodium nitroprusside also alters the pattern of blood flow through the vessels that feed the heart, making it useful in the treatment of patients with heart problems. Other Drugs Like Sodium Nitroprusside Several nitrate-based drugs are used for the treatment of high blood pressure and heart problems. Two common nitrates are isosorbide dinitrate and nitroglycerin. All of the nitrate drugs can be used to treat heart problems, and some, like nitroglycerin, are used almost exclusively for that purpose. Sodium Nitroprusside Side Effects The most serious potential side effect of sodium nitroprusside is cyanide poisoning. The conversion of sodium nitroprusside to nitric oxide produces cyanide as a byproduct. In small amounts, this cyanide is managed by the liver, which changes it into a less toxic chemical that is quickly excreted in the urine. In cases of long-term use, or if too much is used at one time, the cyanide can overwhelm the liver and lead to cyanide poisoning. For that reason, the administration should be discontinued if blood pressure is not properly controlled after 10 minutes at the maximum dosage. Warning signs include: ConfusionNauseaFatigue The primary treatment is simply to stop the sodium nitroprusside and give supportive care until the body eliminates the cyanide. Choosing a Treatment for High Blood Pressure Only you and your doctor can decide on proper medication for the treatment of high blood pressure. Be sure to notify your doctor if you are pregnant or breastfeeding, and to supply the names of any other medicines and/or supplements you are taking. Remember to include over-the-counter medicines, like aspirin or Advil (ibuprofen), and herbal/natural supplements. Was this page helpful? Thanks for your feedback! Looking to start a diet to better manage your high blood pressure? Our nutrition guide can help. Sign Up You're in! Thank you, {{form.email}}, for signing up. There was an error. Please try again. What are your concerns? Other Inaccurate Hard to Understand Submit Continue Reading