Can anyone tell me of any foundations or charities that help pay for medications even though you have medicaid

I'm trying to find a foundation or a charity that will help pay for a medication called anzemet. The Pact Plus program paid supplied it to me for 2 years but because I have gastroparesis and not cancer they will no longer provide me with istance. I have medicaid but I only get 6 prescriptions a month and am on about 20 different ones and also medicaid will not cover the cost of this medication and I was told even if they did they would only give me 5 pills a month. I take this medication every 4 hours so I need a total of 90 pills so I can cut them in half so I can take 50 mgs. at a time. If anyone knows where I can receive help please get in touch with me. Thanks