I have a prescription for perphenazine that my wife takes on a daily basis and with her last subscription she swears she can feel it not working. She also says that she feels better mentally or worse mentally depending on where the meds come from. For example when she was in the hospital she said she felt really good and it did show. I seen her dramatically improve but when she got out and we had the scrpit filled at our local pharmacy after about 5 days she was suicidal and had to go back in. Is it possible the med strengths vary from place to place? and I want to have the meds that made her suicdal tested by an independent lab. Is that possible? Is it possible that being a 1st generation med the pills could be old? Any help would be appreciated. Thank you.