Question $5(1$ point$)$

Prior to initiating therapy with nifedipine, the patient must stop drinking grapefruit juice at least $3$ days prior. What is the primary reason for doing this?

a$)$ Grapefruit juice will decrease nifedipine's effectiveness.

b$)$ Grapefruit juice will increase nifedipine levels in the blood.

c$)$ The vitamin $C$ in grapefruit juice causes the nifedipine to be excreted in urine.

d$)$ The potassium in grapefruit juice increases the patient's risk of hyperkalemia.