Questions and Answers
What do alpha blockers do?
Which conditions are alpha blockers used to treat?
Name one medication classified as an alpha blocker.
Doxazosin, Prazosin, or Terazosin
What is a contraindication for doxazosin?
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List one contraindication for prazosin.
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What condition is terazosin contraindicated for?
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What is a common side effect of alpha blockers?
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Alpha blockers can cause significant _ upon the first dose.
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Alpha blockers should be taken in the morning to prevent dizziness.
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What should clients be taught regarding medication?
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Study Notes
Alpha Blockers Overview
- Alpha blockers induce vasodilation by inhibiting norepinephrine binding to smooth muscle receptors in blood vessels.
- They also relax the prostate and bladder neck, beneficial for patients with benign prostatic hyperplasia (BPH).
Clinical Applications
- Indicated for managing hypertension, BPH, Raynaud's disease, scleroderma, and pheochromocytoma.
Common Alpha Blocker Medications
- doxazosin (Cardura)
- prazosin (Minipress)
- terazosin (Hytrin)
Doxazosin (Cardura) Specifics
- Contraindicated for individuals with a history of hypersensitivity to alpha blockers.
Prazosin (Minipress) Specifics
- Contraindications include angina, hypotension, and orthostatic hypotension.
- Caution advised when combined with other antihypertensives due to risk of rapid blood pressure drop.
- Not recommended for pregnant or breastfeeding clients, or those who have undergone ocular surgery.
Terazosin (Hytrin) Specifics
- Contraindicated for patients who are hypotensive, have undergone cataract surgery, or have intraoperative floppy iris syndrome.
- Allergy to quinazoline analogues also poses a contraindication.
Side Effects of Alpha Blockers
- Common adverse effects include orthostatic hypotension, reflex tachycardia, nasal congestion, and impotence.
Nursing Considerations
- Monitor for significant dizziness and syncope, particularly with the "first-dose" phenomenon; initial doses often given at bedtime.
- Advise clients to change positions slowly to prevent orthostatic hypotension; categorize as fall risk.
- Regularly check blood pressure, weight, and laboratory values such as BUN and creatinine, and monitor for edema.
- Educate clients and caregivers on pulse and blood pressure monitoring; notify healthcare providers for abnormal readings.
- Stress the importance of not abruptly discontinuing medication and the need to inform providers if unable to take it.
- Discuss lifestyle modifications to enhance health outcomes.
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Description
Explore the essential concepts of alpha blockers with these flashcards. Learn about their mechanism of action, clinical uses, and effects on blood vessels and the prostate. Ideal for students and professionals looking to deepen their understanding of this medication class.
