I have taken this stuff for years without problems and have had diabetes for many years as well. No high blood pressure, so diabetes is the only thing on the warning list that I have even though I have many health conditions but nothing new, It drops my heart beat dramatically and makes a fluttering in my throat as well as dizziness. This is the only cold and flu medicine that has ever helped me and now it has become dangerous and I have no clue why. I am afraid that maybe my heart has issues I don't know about. Anyone have an idea of why this happens? Anyone have a similar problem with it?