Dealing with high blood pressure

I have high blood pressure, but with massive doses of Diovan, I keep it in the range of 140/80 to 120/80.
Today I went on a long bike ride with two lunatic friends who ride much too fast. I came home, had a margarita, stood up, and flopped back into my chair, nearly fainting. My blood pressure is 87/58.
So what do we learn from this? If you have high blood pressure, drink Margaritas.