It's a symptom called orthostatic hypotension- a fancy word for a sudden drop in blood pressure when someone stands up or changes positions too quickly.

This can be caused by a combination of many factors, including but not limited to low blood sugar, dehydration, overheating, anxiety, and... being stoned. You should be fine if it happens occasionally, it does to many people (including me!)

If it persists despite none of these factors, or becomes an issue, go to your GP. They'll do an orthostatic set of blood pressures- another fancy medical term for taking your blood pressures while laying down, sitting, and standing, and comparing the differences between them. If it's enough, they'll do further testing.

More likely than not, it's just a minor thing. Annoying, yes, but prevention of the above mentioned topics should help! :thumbsup: