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Cholesterol (Antilipemic) Medications - Pharmacology - Cardiovascular

Feb 14, 2025

Lecture Notes: Cholesterol Medications (Antilipemic Medications)

Overview

  • Focus on medications used to manage cholesterol levels.
  • Includes different classes: Statins, Cholesterol Absorption Inhibitors, Bile Acid Sequestrants, Fibric Acid Derivatives, and Niacin.

Statins

  • Purpose: Used for hypercholesterolemia and prevention of coronary heart disease in high-risk patients.
  • Mechanism: Decrease LDL ("lousy" cholesterol), increase HDL ("happy" cholesterol).
  • Side Effects:
    • Hepatotoxicity
    • Muscle pain
    • Rhabdomyolysis
    • GI upset
  • Administration Notes:
    • Take with evening meal (cholesterol synthesis at night).
    • Think "statin" before "satin sheets."
    • Monitor liver function and creatine kinase levels.
    • Avoid alcohol and grapefruit juice.

Cholesterol Absorption Inhibitor: Ezetimibe

  • Mechanism: Inhibits absorption of cholesterol in the small intestine.
  • Side Effects:
    • Hepatotoxicity
    • Muscle pain
  • Monitoring: Liver function and CK levels.

Bile Acid Sequestrants

  • Examples: Colesevelam, Colestyramine
  • Mechanism: Bind to bile acids in intestine, increasing cholesterol excretion, lowering LDL levels.
  • Side Effects:
    • Constipation
    • GI upset
  • Administration Notes:
    • Increase fiber and fluid intake to prevent constipation.
    • Take with food and full glass of water.
    • May interfere with absorption of fat-soluble vitamins (A, D, E, K).
    • "Fat deck" mnemonic for vitamins.

Fibric Acid Derivatives

  • Examples: Gemfibrozole, Fenofibrate
  • Mechanism: Decrease triglyceride production and transport; increase HDL levels.
  • Side Effects:
    • GI upset
    • Gallstones
    • Hepatotoxicity
    • Muscle pain
  • Administration Notes:
    • Take 30 minutes before breakfast and dinner.
    • Monitor liver function.

Niacin (Vitamin B3)

  • Purpose: Used in large doses for hypercholesterolemia.
  • Mechanism: Decreases lipoprotein and triglyceride synthesis.
  • Side Effects:
    • Flushing of the face ("not nice")
    • GI upset
    • Pruritus
    • Hepatotoxicity
    • Possible hyperglycemia
  • Monitoring: Liver function and caution in diabetic patients due to hyperglycemia risk.

Conclusion

  • Next video will cover vitamins, minerals, and electrolytes for correcting imbalances.
  • This is part of a series on cardiovascular medications.