The nurse is caring for a client with chest pain in the emergency department at 0750. Review the chart. Which prescription requires clarification with the provider before it is given?

Quick answer
Nitroglycerin needs clarification because of recent sildenafil.

Why this is correct
The notes show sildenafil taken at 2200, under 10 hours before the order. PDE5 inhibitors and nitrates together cause severe, prolonged vasodilation and hypotension; nitrates are avoided for 24 hours after sildenafil. The BP is normal now, which is exactly why the danger is easy to miss.

Easy analogy or mental picture
Sildenafil opens the vessel doors; nitroglycerin opens them too. Together, the doors come off their hinges and the pressure falls out.

Memory hook
PDE5 inhibitor in the last 24 h (48 h for tadalafil) = NO nitrate.

NCLEX decision rule
For order clarification in a chart item, match each order with a specific chart finding; a finding that looks concerning must be a true contraindication to count.

Why the other choices are wrong
The aspirin order draws attention because of the listed "intolerance," but stomach upset is not an allergy and aspirin benefit in ACS outweighs it. Heparin tempts because of the old hemorrhoid bleed and a platelet count near the low-normal range, but neither is an active bleed or thrombocytopenia. Metoprolol tempts in an inferior MI, yet HR 72, BP 138/84, and clear lungs show no bradycardia, hypotension, or heart failure to prevent its use.