A couple of suggestions:
1. go to official drug website of the brand name of what you need. Drug co's often have coupons for their branded drugs. Ex. Brand name Abilify. I get it for $5 copay. The generic costs me about $150.
2. Try Goodrx.com They offer discounts on a bunch of meds, you just show the free card
3. I haven't checked this out, but somewhere on Psych Central I've seen a link for a prescription card. Maybe on the psychiatric medicine forum