Lesson #31 has been enlightening, as has all of the previous lessons. Thanks. For years the above activities have aggravated my symptoms. Recently, I noticed a slight decrease in the TMS symptoms. I'm wondering if the decrease is due to the effectiveness of the TMS Structured Program I'm following. Or, is the decrease caused by my ceasing to take Simvastatin. According to the Drug literature, Simvastatin possible side effects include joint pain, muscle pain or back pain. Is there some simple way of determining which factor (TMS or Simvastatin) has caused the slight decrease? My reason for asking this question is that my conviction that TMS treatment caused the decrease was a bit shaken when I read that "Simvastatin possible side effects include joint pain, muscle pain or back pain." My curiosity seems reasonable, but I don't want doubt of the TMS treatment to adversely affect my recovery from TMS. ANY IDEAS?