Before administering nitroglycerin, which interaction must be checked for?

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Multiple Choice

Before administering nitroglycerin, which interaction must be checked for?

Explanation:
The main concept is the risk of a serious interaction between nitroglycerin and PDE5 inhibitors. Nitroglycerin works by releasing nitric oxide to increase cGMP and cause vasodilation. PDE5 inhibitors block the breakdown of cGMP, so if both are used together the vasodilation is amplified far more than intended, potentially causing a dangerous drop in blood pressure, fainting, or shock. That is why you must check for PDE5 inhibitor use before administering nitroglycerin and avoid giving it if the patient has recently taken one. Beta blockers, calcium channel blockers, and antipsychotics can interact in other ways, but they do not carry the same acute, life-threatening risk with nitrates as PDE5 inhibitors.

The main concept is the risk of a serious interaction between nitroglycerin and PDE5 inhibitors. Nitroglycerin works by releasing nitric oxide to increase cGMP and cause vasodilation. PDE5 inhibitors block the breakdown of cGMP, so if both are used together the vasodilation is amplified far more than intended, potentially causing a dangerous drop in blood pressure, fainting, or shock. That is why you must check for PDE5 inhibitor use before administering nitroglycerin and avoid giving it if the patient has recently taken one. Beta blockers, calcium channel blockers, and antipsychotics can interact in other ways, but they do not carry the same acute, life-threatening risk with nitrates as PDE5 inhibitors.

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