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Pravastatin - Pravastatin Brand Name

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Pravitin - (Prevastatin), Lynch's Pharmacy Douglas,
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Pravastatin (marketed as Pravachol or Selektine) is a member of the drug class of statins, used in combination with diet, exercise, and weight loss for lowering cholesterol and preventing cardiovascular disease.


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Medical uses

Pravastatin is primarily used for the treatment of dyslipidemia and the prevention of cardiovascular disease. It is recommended to be used only after other measures, such as diet, exercise, and weight reduction, have not improved cholesterol levels.

The evidence for the use of pravastatin is generally weaker than for other statins. The antihypertensive and lipid-lowering treatment to prevent heart attack trial (ALLHAT), failed to demonstrate a difference in all-cause mortality or nonfatal myocardial infarction/fatal coronary heart disease rates between patients receiving pravastatin 40 mg daily (a common starting dose) and those receiving usual care.


Pravitin - (Prevastatin), Lynch's Pharmacy Douglas,
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Adverse effects and contraindications

Pravastatin has undergone over 112,000 patient-years of double-blind, randomized trials using the 40-mg, once-daily dose and placebos. These trials indicate pravastatin is well tolerated and displays few noncardiovascular abnormalities in patients. However, side effects may occur. A doctor should be consulted if symptoms such as heartburn or headache are severe and do not go away.

These uncommon side effects should be promptly reported to the prescribing doctor or an emergency medical service:

  • muscle pain, tenderness, or weakness
  • lack of energy
  • fever
  • jaundice, yellowing of the skin or eyes
  • pain in the upper right part of the stomach
  • nausea
  • extreme tiredness
  • unusual bleeding or bruising
  • dark-colored urine
  • loss of appetite
  • flu-like symptoms
  • rash
  • hives
  • itching
  • difficulty breathing or swallowing
  • swelling of the face, throat, tongue, lips, eyes, hands, feet, ankles, or lower legs
  • hoarseness

These symptoms should be reported to the prescribing doctor if they persist or increase in severity:

  • heartburn
  • headache
  • memory loss or forgetfulness
  • confusion

Contraindications, conditions that warrant withholding treatment with pravastatin, include pregnancy and breastfeeding. Taking pravastatin while pregnant could lead to birth defects. While the amount of pravastatin ingested by an infant from breastfeeding is low, patients breastfeeding should not take pravastatin due to potential effects on the infant's lipid metabolism.


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Drug interactions

Medications that should not be taken with pravastatin include, but are not limited to:

  • Cimetidine (Tagamet)
  • Colchicine (Colcrys)
  • Cyclosporine (Neoral, Sandimmune)
  • Ketoconazole (Nizoral)
  • Additional cholesterol-lowering medications such as: fenofibrate (Tricor), gemfibrozil (Lopid), cholestyramine (Questran, Questran Light, Cholybar), and niacin (nicotinic acid, Niacor, Niaspan);
  • Specific HIV protease inhibitors such as: lopinavir and ritonavir (Kaletra), and ritonavir (Norvir) taken with darunavir (Prezista); and spironolactone (Aldactone).

Pravastatin is cleared by the kidney, giving it a distinct advantage over other statins when a potential for drug interactions using the hepatic pathway exists.


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Mechanism of action

Pravastatin acts as a lipoprotein-lowering drug through two pathways. In the major pathway, pravastatin inhibits the function of hydroxymethylglutaryl-CoA (HMG-CoA) reductase. As a reversible competitive inhibitor, pravastatin sterically hinders the action of HMG-CoA reductase by occupying the active site of the enzyme. Taking place primarily in the liver, this enzyme is responsible for the conversion of HMG-CoA to mevalonate in the rate-limiting step of the biosynthetic pathway for cholesterol. Pravastatin also inhibits the synthesis of very-low-density lipoproteins, which are the precursor to low-density lipoproteins (LDL). These reductions increase the number of cellular LDL receptors, thus LDL uptake increases, removing it from the bloodstream. Overall, the result is a reduction in circulating cholesterol and LDL. A minor reduction in triglycerides and an increase in high-density lipoproteins (HDL) are common.


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History

Initially known as CS-514, pravastatin is a derivative of ML236B (compactin), which was identified in a fungus called Penicillium citrinum in the 1970s by researchers of the Sankyo Pharma Inc. It is being marketed outside Japan by the pharmaceutical company Bristol-Myers Squibb. In 2005, Pravachol was the 22nd-highest selling brand-name drug in the United States, with sales totaling $1.3 billion.

The U.S. Food and Drug Administration approved generic pravastatin for sale in the United States for the first time on April 24, 2006. Generic pravastatin sodium tablets are manufactured by Biocon Ltd, India and TEVA Pharmaceuticals in Kfar Sava, Israel.

Source of the article : Wikipedia



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