I have been taking vitamin d since April I am on Fultium D2 800IU capsules just one a day. The last few days I feel really nauseous and got this horrible dizzy feeling more when I'm in bed and turn over and everything starts spinning, very weird. I am also on Levo 75mcg and had a blood test two weeks ago which have come back 'normal' no action required but at that time hadn't got the dizziness or nausea. Read the leaflet with the vit d and it does say it can cause nausea. anyone got any ideas?