Lightheaded and Dizzy

First thanks for all this great information from all folks out there.  I have started using Splenda since 30-40 days.  I have had gradually increasing lightheadedness and dizziness that started bothering me for the last 20 days.  I would feel dizzy most of the time, plus I have 15-20 episodes of 1-2 second lightheadedness most of the day for the last 10 days.  I could not figure out what it was.  I did suspect Splenda but kept using it for another week before I got the Web for search.  Being a doctor myself, it took a while to suspect the culprit.  I was going to get an EKG, though my mind was not supporting this.  My BP was stable.  My Pulse was not slow either.  During one episode -- while I was seeing my patient -- I had sudden onset dizziness, and I had to sit for 10 minutes and then rest for one hour before I came to my feet.  Sometimes I feel I am going to pass out, but I do not have palpitations or ear issues.  During other episode -- I became dizzy after running 2 miles -- something that never happened to me.  No skipped heart beats either.  I am not diabetic, by the way.

It's now two days since I stopped [using] Splenda in my tea.  One immediate thing I noticed was I no longer had those 1- or 2-second episodes of lightheadedness -- quite evident since last 48 hours.  I am still having mild dizziness -- maybe it's still in my system and may take [a] few days to clear out.

Just as I have benefited from numerous postings by selfless folks out there, I believe this will help people out there.  Just scares - if had gone for a $10,000 workup before stopping Splenda.

HV