Drugs for Atherosclerosis Prevention
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Questions and Answers

What is the primary role of bile acids in the intestine?

  • Increasing constipation
  • Enhancing the binding of LDL-cholesterol
  • Promoting the excretion of triglycerides
  • Inhibiting the reabsorption of cholesterol (correct)

Which medication is known to enhance the excretion of bile acids?

  • Statins
  • Alirocumab
  • Cholestyramine (correct)
  • Niacin

What effect do the antibodies mentioned have on LDL-cholesterol levels?

  • Eliminate LDL levels completely
  • Decrease LDL levels by 60-70% (correct)
  • Increase LDL levels by 60-70%
  • Have no effect on LDL levels

Which of the following is a limitation of using monoclonal antibodies in treating hyperlipoproteinemia?

<p>They only work as a last resort drug (C)</p> Signup and view all the answers

How does the use of bile acids affect cholesterol in the liver?

<p>It reduces the availability of LDL-cholesterol (B)</p> Signup and view all the answers

What common side effect is associated with monoclonal antibodies mentioned in the content?

<p>Skin reactions (B)</p> Signup and view all the answers

What condition does cholesterol-lowering therapy primarily aim to combat?

<p>Hyperlipoproteinemia (C)</p> Signup and view all the answers

Which of the following treatments is considered when other drugs fail to work?

<p>Alirocumab (C)</p> Signup and view all the answers

What is the primary mechanism of action of statins in cholesterol management?

<p>Inhibits the rate-limiting step in cholesterol synthesis (D)</p> Signup and view all the answers

What adverse effect is commonly associated with the use of statins?

<p>Myopathy (B)</p> Signup and view all the answers

Which drug class is indicated for lowering LDL cholesterol and works by inhibiting cholesterol absorption in the gastrointestinal tract?

<p>Stero absorption inhibitors (C)</p> Signup and view all the answers

What is the primary purpose of fibric acid derivatives in cholesterol management?

<p>Increase breakdown of triglycerides (D)</p> Signup and view all the answers

Which of the following adverse effects is associated with fibric acid derivatives?

<p>Myopathy (A), Bloating (C)</p> Signup and view all the answers

How do statins help lower LDL cholesterol levels?

<p>By reducing hepatic cholesterol synthesis (B)</p> Signup and view all the answers

Which of the following drugs would most likely be used in combination with statins?

<p>Ezetimibe (B)</p> Signup and view all the answers

Which of the following describes an effect of bile acid sequestrants in cholesterol management?

<p>Decrease LDL cholesterol (B)</p> Signup and view all the answers

Which of the following statements about fibric acid derivatives is correct?

<p>They enhance the secretion of VLDL. (C)</p> Signup and view all the answers

What is a known consequence of statin therapy related to liver function?

<p>Increased liver enzyme levels (C)</p> Signup and view all the answers

Flashcards

Bile acid binding resins

Drugs that bind bile acids in the intestine, preventing their reabsorption and promoting their excretion, which lowers cholesterol.

Cholestyramine

A bile acid binding resin used to lower cholesterol.

LDL-cholesterol

Low-density lipoprotein cholesterol, a type of bad cholesterol.

Monoclonal antibodies

Antibodies that are identical and target a specific molecule.

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Alirocumab and evolocumab

Drugs that lower LDL-cholesterol by targeting a specific protein.

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Hyperlipoproteinemia

High levels of lipoproteins in the blood.

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Liver limitation

A condition where the liver has limits to how much work it can do.

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Last resort drug

Medication used only when other options have failed.

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Statins

Drugs that inhibit cholesterol synthesis in the liver, leading to reduced LDL cholesterol levels.

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HMG-CoA Reductase

The enzyme that statins inhibit to reduce cholesterol production.

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Ezetimibe

A drug that inhibits cholesterol absorption from the digestive tract.

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VLDL

Very-low-density lipoprotein, containing mostly triglycerides.

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Hypertriglyceridemia

High levels of triglycerides in the blood.

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Fibric Acid Derivatives

Drugs that increase the breakdown of triglycerides and reduce VLDL secretion.

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Gemfibrozil

A fibric acid derivative used to treat high triglycerides and lower cholesterol.

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Myopathy

Muscle weakness or pain, an adverse effect of some lipid-lowering drugs.

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Cholesterol Absorption Inhibitors

Drugs that prevent the absorption of cholesterol from the gut.

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Study Notes

Drugs for Atherosclerosis Prevention

  • Statins

    • Inhibit HMG-CoA reductase, a rate-limiting step in cholesterol synthesis
    • Adverse effects: myopathy (muscle function problems), liver enzyme abnormalities
    • Therapeutic effect/use: First-line treatment for lowering LDL cholesterol levels
    • Typically used with statins
  • Sterol Absorption Inhibitors (e.g., Ezetimibe)

    • Inhibit cholesterol absorption in the small intestine
    • Lower plasma cholesterol levels
  • Fibric Acid Derivatives (e.g., Gemfibrozil)

    • Reduce VLDL levels by:
      • Increasing breakdown of triglycerides
      • Decreasing VLDL secretion by the liver
      • Increasing breakdown of fatty acids in adipose tissue
    • Adverse effects: Rashes, GI upset, myopathy, hyperkalemia
  • Bile Acid Binding Resins (e.g., Cholestyramine)

    • Bind bile acids in the intestine, inhibiting their reabsorption
    • Increase cholesterol excretion into the bile in the liver
    • Therapeutic effect/use: Lower LDL (20-30%)
    • Adverse effects: Bloating, constipation
  • PCSK9 Inhibitors (e.g., Alirocumab and Evolocumab)

    • Monoclonal antibodies that target PCSK9 protein, a protein that increases LDL levels
    • Improve the liver's ability to remove cholesterol from the blood
    • Adverse effects: Mild skin rash, upper respiratory tract infection, limitation, complications (injection every 2-4 weeks)
    • Therapeutic effect/use: Lower LDL levels by 60-70%, used when other drugs fail or patient has very high LDL. Last resort drug.

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Description

This quiz covers various medications used in the prevention of atherosclerosis, including statins, sterol absorption inhibitors, fibric acid derivatives, and bile acid binding resins. Each drug's mechanism of action, therapeutic effects, and potential adverse effects are discussed, providing a comprehensive overview for students of pharmacology.

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