title: Letter: Effect of clonidine on nicotinic-acid flushing.
mesh_terms: D000328:Adult; D000368:Aged; D002986:Clinical Trials as Topic; D003000:Clonidine / Q000008:administration & dosage / Q000627:therapeutic use*; D005260:Female; D006801:Humans; D006937:Hypercholesterolemia / Q000188:drug therapy; D006940:Hyperemia / Q000139:chemically induced / Q000188:drug therapy*; D008297:Male; D008875:Middle Aged; D009539:Nicotinic Acids / Q000008:administration & dosage / Q000009:adverse effects* / Q000037:antagonists & inhibitors / Q000627:therapeutic use; D010919:Placebos
chemical_list: D009539:Nicotinic Acids; D010919:Placebos; D003000:Clonidine