Is it just getting sensation back in your nostrils that causes it? Because I can pobably count on one hand the number of times I sneezed in a years time on one hand while on pain killers. And when comin off it's like half a dozen times a day. I told my gf that if you ever really want to know if I am staying clean just watch for the sneezes. I don't mind them though. It's kind of a good reminder everytime I sneeze it's like GREAT JOB you are still clean!