Adrenergic Antagonists

These flashcards cover key terms and definitions related to adrenergic antagonists, including their effects, contraindications, and various agents used in treatment.

Adrenergic blocking agents

Drugs that inhibit the effects of adrenergic neurotransmitters on adrenergic receptors.

Alpha-selective adrenergic blocking agents

Drugs that block postsynaptic alpha-1 receptor sites, causing vasodilation and a decrease in blood pressure.

Beta-adrenergic blocking agents

Drugs that block beta-receptors of the sympathetic nervous system, affecting heart rate and contractility.

Bronchodilation

Relaxation of smooth muscles in the bronchi leading to widening of the airways, often affected by sympathetic stimulation.

Pheochromocytoma

A tumor of the adrenal medulla that secretes excessive norepinephrine and epinephrine, leading to severe hypertension.

Sympatholytic

A type of drug that blocks or inhibits the sympathetic nervous system.

Phentolamine

A nonselective alpha-adrenergic blocking agent used to prevent tissue necrosis after norepinephrine extravasation.

Doxazosin

An alpha-1 selective adrenergic blocking agent used for treating hypertension and symptoms of benign prostatic hyperplasia (BPH).

Propranolol

A nonselective beta-adrenergic blocker used for treating hypertension, angina, and certain arrhythmias.

Contraindications

Specific situations or conditions where a drug should not be used because it may be harmful to the patient.

Adverse reactions

Unintended and harmful responses to a medication.

Nursing considerations

Key factors that must be taken into account when administering medications, including monitoring and patient education.

Labetalol

A nonselective beta and alpha-adrenergic blocker used to treat high blood pressure.

Cardiac output

The volume of blood the heart pumps per minute, which can be affected by adrenergic blockers.

Hypoglycemia

A condition characterized by abnormally low blood sugar levels, which can be masked by adrenergic blockers.

CNS effects

Central nervous system reactions to drugs, which may include dizziness, fatigue, or confusion.