title: Letter : Long-term therapy with antihypertensive agents.
mesh_terms: D000328:Adult; D006145:Guanethidine / Q000008:administration & dosage* / Q000627:therapeutic use; D006801:Humans; D006973:Hypertension / Q000188:drug therapy*; D008297:Male; D008875:Middle Aged; D013997:Time Factors
chemical_list: D006145:Guanethidine