I don't think it's just going to be them with a problem (it's also not going to kill you to not have cold medicine for a cold...it does only alleviate symptoms, not cure the illness). I'm hardly working poor, but the reason I want cold medicine when I have a cold is that I don't have time to waste being slowed down with a cold, which means I don't have time to go see a doctor either. Also, if I have a cold, the last thing I want to do is sit in a waiting room full of flu patients and contract the flu from them. I go out of my way to avoid scheduling doctor's appointments during cold and flu season.
I'm sure that's going to be the real outcome, they'll find ways around the system to get prescriptions illegally or will just steal them, etc.
No thanks, I'll stick to medicines that are tested for safety, efficacy, and have quality control regulations to comply with.