Hi, my sister takes several medications and she has horrible constipation, she takes Metamucil and ducolace, but does not get relief. She has to take an anti phycotic called prolixin, and something for mini seizures called keppra. She also takes limictil, vitamin b complex, multi vitamin, fish oil, calcium, alandronate for ostioperosis. She also takes a pill for acid reflux. Is there something that we can try over the counter to give her some relief? She drinks lots of water , but it does not help. Thanks you for your time.