Loretta, I have to ask what blood pressure drug you take.

The reason is that I had a severe reaction recently to a long time medication for me... lisinopril.

I was having a severe reaction to it and didn't realize it. One of the symptoms was this "going to pass out" feeling...and a strange rush of lightheadedness when I sat down after walking around.

This was due to excess bradykinin levels, which dilate blood vessels, when they dump into the blood. All ACE inhibitors have this potential... and it doesn't matter if you appear adjusted on them over time. So are you on an ACE inhibitor? People vary in how efficiently they can remove the bradykinin from the body.
Those with slow metabolizing systems, can have the bradykinin build up and a "spell" can occur.

I also developed a drug induced lupus, which affected my joints.
Never underestimate therefore drugs that seem common, like heart medications and blood pressure drugs. Many of them can cause drug induced lupus. The lupus is an inflammatory reaction to certain drugs.

http://www.lupus.org/webmodules/weba...=377&zoneid=17