Question 10

Patients should avoid grapefruit juice while taking Simvastatin.

Grapefruit juice is known to interact with certain medications, particularly those metabolized by the liver. Simvastatin is one such medication, as grapefruit juice can increase its concentration in the bloodstream, leading to a higher risk of side effects.

A) Simvastatin

This option is correct because grapefruit juice inhibits the CYP3A4 enzyme, which is responsible for metabolizing simvastatin. Consequently, consuming grapefruit juice can significantly increase the levels of simvastatin in the body, heightening the risk of adverse effects such as muscle damage.

B) Ibuprofen

This option is incorrect. Ibuprofen is a nonsteroidal anti-inflammatory drug (NSAID) that does not have a known interaction with grapefruit juice. Therefore, patients taking ibuprofen do not need to avoid grapefruit juice.

C) Lisinopril

This option is also incorrect. Lisinopril is an ACE inhibitor used to treat high blood pressure and heart failure, and it does not interact with grapefruit juice. Patients can safely consume grapefruit while on lisinopril.

D) Doxycycline

This option is incorrect as well. Doxycycline is an antibiotic that does not have a significant interaction with grapefruit juice. Patients taking doxycycline are not required to avoid grapefruit juice.

Conclusion

Simvastatin is uniquely affected by grapefruit juice due to its metabolism by the CYP3A4 enzyme, which can lead to increased drug levels and potential side effects. In contrast, ibuprofen, lisinopril, and doxycycline do not exhibit such interactions, making them safe to use with grapefruit juice. Thus, avoiding grapefruit juice is essential only when taking simvastatin.