title: Letter: Timolol, hydrochlorothiazide, blood-pressure, and renin in essential hypertension.
mesh_terms: D000959:Antihypertensive Agents / Q000627:therapeutic use*; D001794:Blood Pressure / Q000187:drug effects; D004357:Drug Synergism; D004359:Drug Therapy, Combination; D006801:Humans; D006852:Hydrochlorothiazide / Q000627:therapeutic use*; D006973:Hypertension / Q000188:drug therapy* / Q000503:physiopathology; D011412:Propanolamines / Q000627:therapeutic use*; D012083:Renin / Q000097:blood*
chemical_list: D000959:Antihypertensive Agents; D011412:Propanolamines; D006852:Hydrochlorothiazide; D012083:Renin