title: Prazosin: the first-dose phenomenon.
mesh_terms: D000284:Administration, Oral; D000328:Adult; D001794:Blood Pressure / Q000187:drug effects*; D002986:Clinical Trials as Topic; D004305:Dose-Response Relationship, Drug; D005260:Female; D006339:Heart Rate / Q000187:drug effects*; D006801:Humans; D007024:Hypotension, Orthostatic / Q000139:chemically induced; D008297:Male; D008875:Middle Aged; D011224:Prazosin / Q000008:administration & dosage / Q000009:adverse effects* / Q000097:blood; D011799:Quinazolines / Q000009:adverse effects*; D013997:Time Factors
chemical_list: D011799:Quinazolines; D011224:Prazosin