There is the PC drug discount card that might help with your Rx expenses.
Also, many pharmacies offer $4 Rx's: Walmart, Target, etc. Tell your pdoc you can't afford expensive Rx's. Pdoc may have samples for you, or can prescribe the drugs that are $4. There is also PPA, a prescription drug assistance program. And many pharmaceutical companies offer help with prescription costs.

Lousy insurance benefits do suck.