Question 53

Sildenafil is contraindicated with nitroglycerin.

Sildenafil, a phosphodiesterase type 5 inhibitor used to treat erectile dysfunction, can cause significant hypotension when taken with nitroglycerin, which is a nitrate medication used for angina. The combination of these two drugs can lead to severe cardiovascular effects, making it essential to avoid their concurrent use.

A) Amoxicillin

Amoxicillin is an antibiotic that is not known to interact with nitroglycerin. It is primarily used to treat bacterial infections and does not have any effects on blood pressure or cardiovascular function, making it a safe option to use alongside nitroglycerin.

B) Sildenafil

Sildenafil is contraindicated with nitroglycerin due to the risk of severe hypotension. Both medications can cause vasodilation, and their combined effect can lead to dangerously low blood pressure, posing a significant health risk to patients.

C) Levothyroxine

Levothyroxine is a medication used to treat hypothyroidism and does not have any known interactions with nitroglycerin. It primarily affects thyroid hormone levels and does not influence blood pressure, making it safe to use in conjunction with nitroglycerin.

D) Metformin

Metformin is an antidiabetic medication that helps control blood sugar levels in patients with type 2 diabetes. There are no significant interactions between metformin and nitroglycerin, allowing for their concurrent use without increased risk of adverse effects.

Conclusion

Sildenafil is the only medication listed that is contraindicated with nitroglycerin due to the potential for severe hypotension when both are used together. The other options—amoxicillin, levothyroxine, and metformin—do not pose similar risks and can be safely administered with nitroglycerin. Thus, understanding the interactions of medications is crucial for safe and effective patient care.