I wanted to know if anyone has ever heard of or use Sentra AM and/or Sentra PM. My rheumatologist has Rx'd them. They resemble a vitamin but are called a "medical food". I am having difficulty sleeping which of course results in more pain, so my rheumatologist sadi that instead of prescribing Ambien for sleep and Provigil for waking he wanted me to try these. Tried them over the weekend and sleep is hardly noticeable better but the mornings are really good after I take it. Anyone have any experience with these? Thanks.