I remember several times in my life when I went to the doctor and in addition to giving me a prescription, they were able to give me free samples of medicine. That way I would have some relief right away, without having to go get the prescription fulfilled, and if I recovered quickly I might even be able to just use the samples and not fulfill it.
I believe the drug companies give samples to the Doctor in hopes of increasing brand recognition and the Doctor would in turn, prescribe their drug more often. For the Doctor, it's a nice service to provide to your patients. It seems like a win-win.
I figure there must be samples that out there for dentists to give to patients as well. I did some google searches and stumbled on these two.
I just requested the free samples, so we'll see how it turns out. My only concern is that they bother us with junk mail, or worse, sales calls.