If you recently aquired Pseudomonas you have a better chance of getting rid of it. If not it often becomes chronic and can only be managed and "knocked back". The 28 days on and off of Toby is a common prescription to knock it back and manage it. You would probably need to also take an oral antibiotic like Cipro or Levo but your Dr would know about that if it was appropriate to your situation. At any rate it is very hard to get rid of once you have had it for some time.