high blood pressure
"Took this for several years whenever I was younger.  Worked perfectly, no problems.  Was able to get off of medication due to lifestyle changes.  After about 3 years, I had to get put back on it and it didn't interact well with me at all the second time around.  After 3 days of taking it, I would start to get a pain in my stomach that was so severe, I could barely stand.  It lowered my blood pressure, but the pain was intense.  2 days after stopping taking it, the pain would go away completely.  Tried a few times to start retaking it, but every time met with the same results."