Cyclosporine
"I am a senior citizen who has been on Restasis for 5 yrs.  It is so expensive that using it puts me in the medicare donut hole.  The drug company, Allergan, is unwilling to give me assistance in the form of samples and my dr's office gave me two samples one time during the 5 yr. period and after that will not help.  I was refused two samples to get me through until Jan 1 when my new insurance year begins.  It costs $481.35 for a monthly supply so even though my copay is only $30, I am in the donut hole by August at the latest.  Allergan has a racket going on here at the expense of the patient. It's not affordable even though it's effective. Totally unfair, corrupt company."