What physiological effect does Precedex have on heart rate and blood pressure?

What physiological effect does Precedex have on heart rate and blood pressure?

• A. It increases both heart rate and blood pressure
• B. It decreases heart rate and blood pressure
• C. It only decreases heart rate
• D. It has no effect on heart rate or blood pressure

Answer: (B)

Precedex, or dexmedetomidine, is an alpha-2 adrenergic agonist primarily used for sedation in various clinical settings. The physiological effects of Precedex involve significant interaction with the autonomic nervous system. By stimulating alpha-2 receptors in the central nervous system, Precedex leads to a decrease in the release of norepinephrine, which is a key neurotransmitter that can increase heart rate and blood pressure. The resultant decrease in sympathetic outflow leads to both bradycardia (decreased heart rate) and hypotension (decreased blood pressure). Therefore, the response aligning with the reduction of both cardiovascular parameters is consistent with the pharmacodynamics of this medication. Thus, when administered, clinicians can expect a calming effect alongside a lowering of both the heart rate and blood pressure, which can be particularly useful in surgical settings where maintaining a controlled hemodynamic state is crucial.

Precedex, or dexmedetomidine, is an alpha-2 adrenergic agonist primarily used for sedation in various clinical settings. The physiological effects of Precedex involve significant interaction with the autonomic nervous system. By stimulating alpha-2 receptors in the central nervous system, Precedex leads to a decrease in the release of norepinephrine, which is a key neurotransmitter that can increase heart rate and blood pressure.

The resultant decrease in sympathetic outflow leads to both bradycardia (decreased heart rate) and hypotension (decreased blood pressure). Therefore, the response aligning with the reduction of both cardiovascular parameters is consistent with the pharmacodynamics of this medication. Thus, when administered, clinicians can expect a calming effect alongside a lowering of both the heart rate and blood pressure, which can be particularly useful in surgical settings where maintaining a controlled hemodynamic state is crucial.