Our son (5 yr old w/cf) was recently put on Tobi (approx 8 days ago). We have noticed the hoarseness in his voice but he also seems to cough more directly after his Tobi. He does not cough much during the day.Has anyone else noticed this? We are concerned because the CF Clinic thouoght he was growing out psuedomonious (sp) but it turned out not to be. They had to send his culture off so see what the bacteria is since they could not identify it at Little Rock Childrens.