Yesterday, I suddenly experienced a feeling something like motion sickness while I was standing in my kitchen -- Wobbly head; couldn t walk a straight line; stomach queasy and with a clutching feeling in my gut; hot flash with sweating. The feeling passed after about 20 minutes and re-occurred later in the day with much the same symptoms but lasted a longer time. I was OK when sitting still, but when I stood up, got the vertigo-like feelings again. My BP was sort of high, 163/92 on my home monitor, down to 139/87 this morning. I have Never experienced this before. The only new thing I could identify was Instaflex, supplement for joint pain, which I had been taking for about 4 days prior. I did not take any more instaflex and today I am fine. I take no other medicines. Is it possible the Instaflex caused these vertigo-like problems?