title: Nitroglycerin ointment as aid to venepuncture.
mesh_terms: D000328:Adult; D002986:Clinical Trials as Topic; D004311:Double-Blind Method; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D005996:Nitroglycerin / Q000008:administration & dosage*; D009824:Ointments; D011677:Punctures / Q000379:methods*; D014680:Veins
chemical_list: D009824:Ointments; D005996:Nitroglycerin