meniere's disease
"If I take diazepam immediately when I start getting dizzy, it usually takes away all dizziness and I am ok.  If I wake up and I am dizzy or if I'm dizzy for an extended period of time before taking diazepam, the diazepam works for a few hours but the dizziness comes back.  I do get sleepy with the medication because I don't take it very frequently but I am able to work while taking it unless I have to take multiple doses and then I am extremely groggy.  My doseage is 5 mg. every 6 hours.  This medication has been extremely helpful in treating my dizziness."