Otherwise you should take other drugs such as
Fortaz IV, ceftazidime-dextrose (iso-osm) IV, ceftazidime Inj, TAZICEF Inj, Fortaz Inj for Acute Pseudomonas Aeruginosa Pneumonia
Zosyn IV, Merrem IV for Pseudomonas Respiratory Tract Infection
There are a tons of other drugs that you may use beside Kalydeco. That's why management decided that since they have been losing .30 per share this quarter or more than $1 a share a year or more than 100M in 21012, it would be best for them to cash out.
Actually it is effective for nearly 20% of the cf population including 551 other gating and residual function mutations. It is just labelled currently for 551, but it will be expanded within a year for many more. And the combo will help nearly 50% of the cf population which will be approved by end of 2013.