Def eat... even if it is just munchies make sure ur not smoking on an empty stomach... I cant tell you how many people come into my lounge.. smoke a session... come up to me and go... why do I have a headache everytime I smoke... and I go did you eat today? lol 98% say No? so i explain why its good... although... I have seen people eat when smoking and go barf outside or on my floor... lol damn people and their tolerances... I use naturals and QL depending on the situation but I always have something in my stomach. And maybe check into the allergy thing (anise).