I spoke with my nephrologist this week and he said that there are two options available. He recommended that patients consult with their pharmacist to decide which one is best given their stage of kidney disease as well as other conditions along with drug interactions.
Iolaire's caution about starfruit is on the mark because only people with healthy kidneys can digest the fruit without problems. The effects on kidney patients range from hiccups to death. Definitely not worth the gamble--especially on vacation.
Here the NKF's link if you're curious: https://www.kidney.org/atoz/content/why-you-should-avoid-eating-starfruit