The worst thing that can happen is you'll turn into a goblin! :shock:
Just kidding, the side effects would be like those you'd get when taking oral spironolactone. Loss of strenth, sex drive, gyno, fatigue, sickness,ect. I cant find it possible that you will feel anything off of the possibility of having like 6mg MAX absorbing into your system. it will be useless internally actually at that dose. Ive applied 2ml per day for weeks and didnt feel a thing. They dont even come in tabs less than 250mg i think, and patients are treated with 750mg's. Seriously think its just a placebo or something. Dont stress it because you are going to worry yourself into side effects. When i first applied Xandrox 15 for the first time i got a weird feeling in my chest like you described for like 1 day, then it passed. See i that same thing happens in a week or two. Try to stick to not applying more than 1ml per day. If you still get that feeling drop it and see if you still get that feeling, if you dont re-start it once more and see if you get that feeling.