I received an email from a friend that bemoaned the ills of Aspertame. She qualified it will that she checked Snopes and Snopes said it was all false so I did not check its validity. She went on and added her personal experience with Aspertame and her related vision issues. Snopes can be good or not so great depending on the topic; I think XKCD said it best.
Two thoughts: First is that there have been plenty off damning things coming out about Aspertame for many years so Aspertame is definitely not all roses and sunshine. To go along with that I highly recommend the video Sweet Misery available on Hulu. Certainly the documentary has a bias, as all documentaries tend to, but well worth seeing. Secondly, and something my friend discovered, it does not matter if everyone tells you something is safe, or that something will fix all your problems, or if some product is just culturally normal. If you personally respond differently than expected than you need to take appropriate action. Equally important and relevant to the Aspertame do not rule out something as a problem just because lots of people (doctors, friends, etc.) have deemed it safe or beneficial. If you are having problems than you need to evaluate your response to your medicine, diet, environment, etc. You are vested more than anyone else in how you feel and you will know more than anyone else how you are responding to something. MRIs and blood tests can not do as good of a job of measuring your overall well being and overall “how you feel” as you can. Be attentive and vigilant to feel better.