Propel has niacin in it. It is not deadly in the dose you are ingesting but it will cause strange sensations, like hot flashes and feverish feeling in different parts of the body. It is very smart to avoid caffeine and alcohol until you get it under control. I have been living with severe anxiety and panic disorder for 14 yrs. The stomach troubles are generally part of it. But I found that without all the different combinations of meds like benzos with my antidep. I started doing well with just one med like paxil or celexa, and after about two months of doing so I felt normal again. NORMAL! The main thing is to understand that this condition it real and not going away without treatment just like if you had high blood pressure. You are one of millions that have it and you can control it to the point of leading a normal life with the moderate drink or two of alcohol, and the ability of ingesting a cola without the dreaded anxiety attack. I went for years without any problems and me and my doctor decided I was ready to come of my medicine paxil. I slowly, SLOWLY came off and went for about a month with no medicine and BOOOOOOM!!! I was hospitalized in CCU and had a echo, stress test, and vascular test. My stomach is a mess!!! Back on medicine, this time celexa, and I am good again. But I have to watch what I eat and drink again until it's back under control. Oh yea my heart---VERY NORMAL!!