My wife is taking tobramycin nebulized 2xper day, 28 days on 28 days off with azithromycin taken prophylactically between. She has MS and is taking it to combat colonized pseudomonas infection. Has worked well for over a year. Last month after quitting she started suffering sudden attacks of apnea, not sleep apnea but wide awake, not brought on by low oxygen. This occurred many times but lasted about one day then ceased for the rest of the month. 4 days ago, a few hours after resuming tobi this month the apnea events returned. Should I ask her doctor to return to azithromycin? Should I stop tobi immediately?