Nitrofurantoin
"I was prescribed Nitrofurantoin in 2006 for chronic UTIs. I took it daily for 2-1/2 years. In 2008 at age 67, I began experiencing serious coughing episodes. I had no known allergies and no known respiratory issues. I went to Health Centre. After multiple tests, I was diagnosed with Interstitial Lung Disease. When I told the doctors about my history of taking Nitrofurantoin for UTI's, they informed me that one of the side affects of this medication is respiratory problems. They also informed me that anyone 60+ should not take nitrofurantoin for an extended period (2-1/2 years).  Therefore, they concluded that my lung disease was the direct result of taking Nitrofurantoin for an unreasonable period of time."