bummer...I was so hopeful that after 3 months of inhaled GSH twice a day that maybe, just maybe, PA would not creep back in again. But, it has and we are back on Tobi and Cipro. And because the Tobi takes forever to administer, we don't have enough hours in the day to add the GSH in with it. So, for 28 days there will be no GSH. So, we are increasing the oral GSH some. Do you know of anyone that has eradicated the PA with GSH? I just thought my daughter was doing so well, no more clearing her throat and now she is coughing and blowing and the PA showed up on her culture. So frustrating....