hi, was on vikiden 750/750 for 10years,went to narco 750/350 for one year, did not seem to be working, went back to the vikiden 750/750. i was taking the narco's 4-5 times a day, now am allowed to take 4 vikiden's day, but am trying to take only 2 750/750 a day,because of possible liver damadge. but feeling wierd, could this be because of not taking the 4 a day? THANKS MARK