61 hours, getting close to the 72 mark that many people believe equals the time needed for nicotine to leave the body. My brain is still screaming for a cigarette, I don’t know if I could have resisted without my ear ache and allergies acting up. If it works this time and I quit smoking, then what? What do I do about my allergies? I’m only allergic to cats, the allergist said that I had mild allergies to some tree pollen, egg yolks and milk that were being blown out of proportion by the cats.