I was on Prilosec for 3 days, then switched to Aciphex for one da...

I was on Prilosec for 3 days, then switched to Aciphex for one day. Within hours after starting the medication, I was extremely drowsy, dizzy, and just "out of it." I also have dry mouth and facial numbness. The side effects are pretty incapacitating, and the most distressing thing is that I stopped the meds 5 days ago, yet the symptoms persist. My doctor has run a series of tests to rule out other problems, and agrees this may be a bad reaction to Prilosec. Has anyone ever experienced anything like this, and if so, how long until the side effects went away?