I am 64 years old , had by pass surgery , high blood pressure , high cholesterol , over weight . I am on Plavix , can t take aspirin and have arthritis . For some time now I get dizzy when stand up , turning head to fast . But lately I have started to feel like I would pas out and knees and arm felt like they was going to give out ... When this occurred , checked blood sugar , 115 , blood pressure was 140/70, pulse 63 . Don t know if Vertigo , medication or something wrong .. All my medication says can cause dizziness .. Don t know what to do ...