Pleurisy and tussicaps?

i have really bad bronchitis and pleurisy. i was prescribed tramadol and benzonatate ( they called it something pearls..they are like little gel caps). Well, the tramadol has not helped with the pain at all. I called the dr. today and told him, and he called me in something called "tussicaps". Has anyone ever heard of this? does it help for pleurisy? the pain in my chest is terrible!! I can hardly take a deep breath. it feels like i am being stabbed all the way through to my back. the prescribtion for the tussicaps says take 2 a day, if i take one and it doesn't help can i take another one a little while later or do i have to wait a certain amount of time? I would call and ask the Dr., but they are closed now and won't be back till after Christmas. Help!!