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Introduction: Orthostatic Hypotension (OH) is a frequent situation during consultation in hypertensive patients. The prevalence in the general population increases with age and it is recommended to systematically search for it in patients with multiple comorbidities. The objective of this study was to determine the prevalence of orthostatic hypotension; describe their sociodemographic profile, the various clinical and paraclinical aspects and the predisposing factors of orthostatic hypotension in treated hypertensives, controlled or not. Method: This was a descriptive cross-sectional study, from January 2 to June 30, 2022 in the cardiology department of the Ignace Deen National Hospital. Included in this study were all patients who presented with orthostatic hypotension under antihypertensive treatment, regardless of age and sex, and who agreed to participate in the study. The non-inclusion criteria were hypertensive patients without OH and those who had not agreed to participate in the study. Each patient had blood pressure and heart rate measured in the supine position at room temperature and with an empty bladder. Then the measurement is taken again three (3) minutes after the switch to orthostatism. We retained the diagnosis of OH if the SBP drops by at least 20 mmHg and/or the PAD by at least 10 mmHg three (3) min after the transition to orthostatism. Our data obtained were analyzed in the Epi-info 7.4.0 software. Results: During our study period, we investigated 385 presented with OH, 12.2%. The mean age of the patients was 60.83 years ± 10.01 years and hypertensive patients, 47 of whom the M/F sex ratio was 0.81. In our study, blood pressure was not controlled in 36.2% of our patients with a predominance of grade 3 hypertension, a rate of 55.32%. Renal failure, anemia, heart failure and stroke were the main comorbidities associated with How to cite this paper: Sory Barry, I.