Tehran University of Medical Sciences Current Journal of Neurology 2717-011X 15 2 2016 04 05 92 95 EN Payam Khomand Department of Neurology, Tohid Hospital, Kurdistan University of Medical Sciences, Sanandaj, ‎Iran Kambiz Hassanzadeh Cellular and Molecular Research Center AND Department of Physiology and Pharmacology, ‎School of Medicine, Kurdistan University of Medical Sciences, Sanandaj, Iran 2016 02 06 2016 02 20 Background: We report a case series of cerebral vein thrombosis (CVT) in women who used oral contraceptive pill (OCP) in the Muslims Ramadan and fasting month. Methods: This study was a retrospective case series of 9 patients with diagnosis of CVT, who admitted in the neurology ward of Tohid Hospital of Sanandaj, Iran, in July-August 2014-2015. Results: Patients had no history of thrombosis before. They were treated with oral contraceptive more than 1 month to be able to fast during Ramadan. They did not have other possible risk factors for CVT. A headache was the most common in 9/9 patients (100%) followed by vomiting and vertigo. Conclusion: We found that high rate of CVT in female population during Ramadan indicates that it needs be considered as a specific risk factor and should be considered by healthcare system. https://ijnl.tums.ac.ir/index.php/ijnl/article/view/985 https://ijnl.tums.ac.ir/index.php/ijnl/article/download/985/271