I began losing weight before the antiobiotics, while I was quite ill with MAC & pseudomonas, coughing non-stop and have a fever for over a year. The loss continued the first six month of treatment, and my weight stabilized for about a year. Then the daily regimen of meds "took over my life" and we stopped the antibiotics; I didn't begin to regain the weight until a few months later. Then it took over 2 years to regain most of what I had lost - I am happy with my current weight and most of my clothes fit again.
Sue