Jul 27, 2018 Pharmacologically Induced Headache Accompanied by Dilated Cephalic Vessels Pharmacologically Induced Headache Accompanied by Dilated Cephalic VesselsHeadache induced by calcitonin gene-related peptide and sildenafil occurs with dilation of cephalic blood vessels, according to a study published in ... read morePublished on 2018-07-27