Hi BobbyG,

That reads like a hypotension trifecta.
Part of what you're describing sounds like orthostatic hypotension. Dizziness or loss of balance caused by a drop in blood pressure when standing up.
Generally hypotension can also be a common side effect of some cholesterol drugs especially when combined with other medications.
Another consideration is that blood pressure drops after a meal (blood going to organs used in the digestive process).

Did you ever experience anything like "tunnel vision" during these episodes? Vision getting dark around the edges then narrowing?

Standing up quickly + meds that cause hypotension + a recent meal combined can result in a sudden drop in blood pressure that could cause loss of consciousness followed by succumbing to gravity and kissing the carpet. That is if one is lucky enough to do their header into a carpet and not something significantly harder and more destructive to human anatomy. Like a major appliance or down a flight of stairs.
Then there's that whole "maintaining a patent airway." Unconscious people generally suck at that sort of thing.

Definitely cause for concern.