Candy, it was the 5th treatment that set off my really bad shortness of breath and someone else posted that it was during the first week that she lost her voice. I think if you make it through the first week you should be fine throughout the treatment. Frankly, I'm jealous that you can do the treatment in the morning and go on about your day. I cough so much that I do the treatment around 5:30 p.m. so I will stop before bedtime. Rita