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Questions and Answers
Which drug inhibits the release of noradrenaline and can cause a paradoxical increase in heart rate?
Which drug has powerful mixed vasodilatory effects, leading to a decrease in both systolic and diastolic blood pressures?
Which drug is more effective in benign prostatic hyperplasia due to its selective action on a1a receptors?
Which drug acts by blocking postsynaptic a1 receptors, resulting in vasodilation and decreased blood pressure?
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Which drug inhibits the synthesis of noradrenaline and can be used for the treatment of pheochromocytoma?
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Study Notes
Alpha-Adrenergic Antagonists
- Yohimbine inhibits the release of noradrenaline and can cause a paradoxical increase in heart rate.
Vasodilatory Effects
- Phentolamine has powerful mixed vasodilatory effects, leading to a decrease in both systolic and diastolic blood pressures.
Benign Prostatic Hyperplasia
- Tamsulosin is more effective in benign prostatic hyperplasia due to its selective action on α1a receptors.
Antihypertensive Effects
- Prazosin acts by blocking postsynaptic α1 receptors, resulting in vasodilation and decreased blood pressure.
Noradrenaline Synthesis Inhibition
- Metyrosine inhibits the synthesis of noradrenaline and can be used for the treatment of pheochromocytoma.
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Description
Test your knowledge about sympathetic depressants with this quiz. Identify medications and chemicals that act on adrenergic receptors, neuronal activity, and ganglia to depress sympathetic nervous system function.
