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Ranolazine

Ranolazine is a medication used primarily to treat chronic angina (chest pain due to coronary artery disease). It is classified as an antianginal agent, and while its exact mechanism of action is not fully understood, it is believed to work by improving the heart's efficiency and reducing the oxygen demand of the heart.

  • Recommended Usage
Indications:
  • Chronic angina: Ranolazine is used to help control angina in patients who have not achieved adequate relief with other medications like beta-blockers, nitrates, or calcium channel blockers.
  • Off-label uses: In some cases, ranolazine has been studied for heart failure with preserved ejection fraction (HFpEF), though this use is not FDA-approved.
Dosage and Administration:
  • Standard Dose: The usual starting dose is 500 mg twice daily. This may be increased to 1000 mg twice daily based on patient tolerance and effectiveness.
  • Adjustment: Dose adjustments are made based on the patient's response and the presence of any side effects.
  • Administration: It should be taken twice a day, with or without food. If a dose is missed, it should not be doubled; the next dose should be taken as usual.

Ranolazine is taken orally, with or without food, and capsules should be swallowed whole.

Precautions:
  • Kidney function: Ranolazine is primarily eliminated via the kidneys, so dose adjustments are required in patients with severe renal impairment (eGFR < 30 mL/min/1.73 m²).
  • Liver function: Caution is advised in patients with liver disease (e.g., cirrhosis) as ranolazine may be metabolized differently.
  • QT prolongation: Ranolazine can prolong the QT interval (a measure of heart rhythm) and should be used cautiously in patients with a history of QT prolongation, low potassium or magnesium levels, or those on other medications that affect the QT interval.
  • Drug interactions: Ranolazine interacts with several drugs, including those that inhibit or induce CYP3A4 (like certain antifungals, HIV medications, and some antibiotics), and drugs that alter P-glycoprotein.
Contraindications:
  • Liver cirrhosis or severe hepatic impairment.
  • Concurrent use with strong CYP3A4 inhibitors (e.g., ketoconazole, clarithromycin, etc.).
  • Prolonged QT interval or history of arrhythmias that predispose to torsades de pointes (a type of dangerous arrhythmia).
  • Hypersensitivity to ranolazine or any of its components.
Key Benefits:
  • Angina relief: Ranolazine helps reduce the frequency and severity of angina attacks by improving the blood flow to the heart and reducing myocardial oxygen consumption.
  • Minimal effect on heart rate or blood pressure: Unlike other antianginal medications (e.g., beta-blockers, nitrates), ranolazine typically does not cause significant changes in heart rate or blood pressure, making it suitable for patients who may not tolerate these changes.
  • Well-tolerated in combination: It is often used in conjunction with other antianginal agents, especially when other treatments do not provide sufficient control.
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