Depends on what your sick with. If you've got soemthing like bronchitis or other lung inflamation that's causing you to cough a lot smoking might not be a good idea. I know because I just got over it. Even a small hit off my vaporizer would send me into a serious coughing fit. I was able to get my hands on some really good weed brownies, however, and these actually made me feel much better than any of the traditional medicines I was taking.