I've heard alot of feedback, similar to satanic's response, from aspartame users claiming they get ear pains or twitching after aspartame consumption. I wonder what causes this? Probably not the phenylaline or aspartic acid, since thats in the protein we consume and alot of the foods we eat everyday.
Maybe the Methanol that may be reason? but then that would happen when you eat sugar and fruit juices too? My guess that may be one the reasons why some epilitic children are on low carb diets year round. Maybe the higher carb consumption the more methanol in your body? and people who are very sensitive to it may be experiencing problems, this is just a guess. I wonder why this happened only after eating aspartame? I wonder if it would happen during a blind test.