I immediately stopped drinking
diet coke and the heart pounding stopped in three days. Because I like
diet coke, about 8 months later, I had one. Almost immediately when I laid down for bed, the pounding started again. From what I have researched, this is a sign of methal alcohol poisoning. It accumulates in you body and it takes time for it to leach out. Stop ingesting aspartame in any form. The stuff is poison.