Pharmacology: Chlorothiazide Flashcards

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Questions and Answers

What is the therapeutic class of chlorothiazide?

  • Antibiotic
  • Antidepressant
  • Antihypertensive (correct)
  • Analgesic

What is the pharmacologic class of chlorothiazide?

Thiazide diuretic

What are the recommended uses for chlorothiazide?

  • Cancer treatment
  • Allergies
  • Severe hypertension (correct)
  • Mild to moderate hypertension (correct)

Which conditions may chlorothiazide also treat edema due to?

<p>Liver disease (A), Heart failure (D)</p> Signup and view all the answers

Chlorothiazide can take up to 4 weeks for optimum therapeutic effect.

<p>True (A)</p> Signup and view all the answers

What are some of the adverse effects of chlorothiazide?

<p>Excess loss of water/electrolytes</p> Signup and view all the answers

Which symptoms may indicate excessive loss of water/electrolytes?

<p>Muscle cramping (A), Thirst (B), Weakness (C)</p> Signup and view all the answers

What is a potential serious consequence of taking Diuril (chlorothiazide)?

<p>Hypokalemia</p> Signup and view all the answers

When taking Diuril, what types of foods should be increased?

<p>Potassium-rich foods (B)</p> Signup and view all the answers

What happens when Diuril is taken with amphotericin B or corticosteroids?

<p>Elevated risk for hypokalemia</p> Signup and view all the answers

What can Diuril taken with sulfonylureas and insulin cause?

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

What decreases the absorption of chlorothiazide?

<p>Cholestyramine and colestipol</p> Signup and view all the answers

Alcohol can increase the hypertensive action of thiazide diuretics.

<p>True (A)</p> Signup and view all the answers

Caffeine may decrease diuresis.

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

What is a possible effect when chlorothiazide is given with other antihypertensives?

<p>Additive effects on blood pressure (B)</p> Signup and view all the answers

Which herbal supplements may interact with thiazide diuretics?

<p>Licorice (A), Oral aloe (C)</p> Signup and view all the answers

Licorice and aloe may worsen hypokalemia.

<p>True (A)</p> Signup and view all the answers

What can occur when chlorothiazide is used with ginkgo biloba?

<p>May increase blood pressure</p> Signup and view all the answers

What may result from taking chlorothiazide with hawthorn?

<p>Additive hypotensive effects</p> Signup and view all the answers

You should take chlorothiazide if you cannot urinate.

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

You can take chlorothiazide if you are allergic to sulfa drugs.

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

What medical conditions should you avoid taking chlorothiazide if you have?

<p>All of the above (D)</p> Signup and view all the answers

When taking chlorothiazide, what should you avoid?

<p>All of the above (D)</p> Signup and view all the answers

Why should you drink as much liquid as instructed by your doctor while taking chlorothiazide?

<p>Drinking too much is just as harmful as drinking too little</p> Signup and view all the answers

What types of medications should you inform your doctor about if they make you lightheaded?

<p>All of the above (D)</p> Signup and view all the answers

What conditions is Diuril (chlorothiazide) used to treat?

<p>All of the above (D)</p> Signup and view all the answers

What are some mild side effects of chlorothiazide?

<p>Diarrhea (A), Dizziness (B)</p> Signup and view all the answers

What are some severe side effects of chlorothiazide?

<p>All of the above (D)</p> Signup and view all the answers

Which foods are considered potassium-rich?

<p>All of the above (D)</p> Signup and view all the answers

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Study Notes

Drug Profile: Chlorothiazide (Diuril)

  • Therapeutic class includes antihypertensive properties and reduces edema.
  • Pharmacologically classified as a thiazide diuretic.
  • Prescribed for mild to moderate hypertension and may be combined with other antihypertensives for severe cases.
  • Used to treat edema associated with heart failure, liver disease, corticosteroid therapy, and estrogen therapy.
  • Maximum therapeutic effect may take up to four weeks; IV administration takes 15-30 minutes.
  • Common adverse effects include excess loss of water and electrolytes, leading to dehydration.
  • Symptoms of excessive electrolyte loss include thirst, weakness, lethargy, muscle cramping, hypotension, and tachycardia.
  • Possible serious consequence is hypokalemia, particularly in patients taking digoxin.
  • Patients should increase potassium-rich food intake; potassium supplements may be necessary.
  • Co-administration with amphotericin B or corticosteroids raises the risk of hypokalemia.
  • Taking with sulfonylureas or insulin may reduce their effectiveness.
  • Cholestyramine and colestipol can decrease chlorothiazide absorption.
  • Alcohol consumption can enhance the hypertensive effects of thiazide diuretics and exacerbate side effects.
  • Caffeine may lead to increased diuresis (urine production).
  • When chlorothiazide is combined with other antihypertensives, it produces additive effects on blood pressure.
  • Certain herbal supplements, like licorice and oral aloe, may interact adversely with thiazide diuretics, potentially worsening hypokalemia.
  • Ginkgo biloba might elevate blood pressure when used with chlorothiazide.
  • Hawthorn may cause additive hypotensive effects when taken with this medication.
  • Do not use if unable to urinate, and contraindications include allergies to sulfa drugs.
  • Avoid use in patients with liver disease, kidney disease, asthma, allergies, gout, lupus, or diabetes.
  • Precautions include avoiding overheating, dehydration, and extreme weather conditions.
  • Follow doctor’s advice on fluid intake since excessive or insufficient hydration can be harmful.
  • Inform healthcare providers about other medications that cause dizziness, including cold medications, narcotics, and sedatives.
  • Indicated for fluid retention in conditions such as congestive heart failure, cirrhosis, kidney disorders, and edema related to steroids or estrogen, as well as hypertension.
  • Mild side effects can include gastrointestinal disturbances, dizziness, muscle spasms, blurred vision, and libido loss.
  • Severe side effects may include nausea with weakness, anorexia, headache, confusion, seizures, muscle pain, uneven heart rate, extreme thirst, jaundice, easy bruising, and numbness or tingling.
  • Potassium-rich foods to consider include seeds, chocolate, dried fruits, avocados, various fish, beans, nuts, and a variety of herbs.

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