You may know it as Postural hypotension, dizziness upon standing. I have suffered with bouts of dizziness for a few years; however over the past seven months it has become more frequent. My dizziness associated with Fibromyalgia (FM) is very distinctive. Visually objects are at a tilted angle, some seem closer then what they actually are, whilst others further away. With Orthostatic Intolerance (OI) I get the typical spinning room effect. I went to curetogether (thank you bruthd for telling me about this link) and OI was listed as a symptom of FM. Does anyone else experience this?