I believe. Btw, the worst component is the smoking cough. It's specially disgusting, because it has got a cigarette-flavour, literally! I experienced it pretty often, and I thank my lungs and complete respiratory system for being sensitive enough to warn me that cigarettes aren't my type of sport.One of my sons brought a cold back with him from college and gave it to us. Stuffed nose, difficult breathing, stand-ten-feet-back dragon breath --- just like smoking!