MDMA and aspartame

[HxL2009]

I read on a website that drinking 'diet' drinks (drinks with aspartame) while taking E/MDMA causes increased chance of neurotoxicity. Anyone ever heard anything about this?

Also- I'm a first-timer when it comes to E, and was planning on taking some, but after reading this, I'm quite skeptical. I drink Diet Dr. Pepper quite frequently (3-5 cans a day, sometimes more), and I'm wondering:

Would this still apply if I just drank water after dropping, or would the aspartame already in my body increase neurotoxicity? Should I just drink water for the entire day before dropping that night?