Hmm - my pdoc prescribes a specific dose of my meds, and that's what the pharmacy fills. Can't you ask your pdoc to simply prescribe a smaller dose? Like if you're currently getting a 1mg pill and then cutting it in half, why can't your doc just prescribe a 0.5 mg pill.

Now, there are some pills that simply don't come in small enough doses, so those might have to be halved. You could ask your pharmacy to cut them for you when they fill the prescription.