Also, I am sure depending on what type of radiation you had photon, or proton will determine these side effects. I had 35 rounds of photon radiation in 2008 which is more harmful as it hits more of your healthy parts of your body. I can tell you any carbonated and most spicy products are still a problem for me. Alcohol too but not as bad as the carbonation/spicy effect.

Best of luck on your journey.