This study was carried out on 90 patient with insulin dependent for at least 10 year those attending the diabetic clinic and internal medicine consultation unit in Al-Diwamiya Teaching hospital and some popular clinic in Al-Diwaniya city and a 120 age and sex match control subject from patients relatives and medical staff. The blood pressure was measured in supine and standing position for each subject, orthostatic hypotension was defined as a decline in systolic blood pressure of 20mmHg or more one minute after standing, postural dizziness was any feeling of dizziness, light headedness, or faintness that occurred while standing. The prevalence of orthostatic hypotension and postural dizziness was higher in patient with diabetes than in control subject from the 90 diabetic patient a 27 develop orthostatic hypotension while only 16 subject develop orthostatic hypotension from the 120 non diabetic control subjects. Those patients with diabetes and had orthostatic hypotension were older and with high fasting glucose level and higher supine systolic blood pressure and lower standing systolic blood pressure than those without orthostatic hypotension. Postural dizziness among the diabetics patient were higher than its prevalence among non diabetic subject, and there was no significant difference between those who had orthostatic with postural dizziness and postural dizziness without orthostatic hypotension in both diabetic and non diabetic control subject.
