title: Efficacy and safety of nifedipine GITS in Chinese patients with hypertension--a post-marketing surveillance study.
abstract: OBJECTIVE
  This post-marketing surveillance study assessed the efficacy, safety and tolerability of the treatment with nifedipine GITS (gastro-intestinal therapeutic system) in hypertensive patients under normal daily practice conditions in China.
  
  
  METHODS
  A total of 3003 patients were included in 174 outpatient clinics. Patients received 30 mg or 60 mg of nifedipine GITS. Data were collected at up to three follow-up visits.
  
  
  RESULTS
  At the end of the observation period, mean treatment duration was 13.3 weeks. Mean blood pressure reduction was 27.6/13.6 mmHg, 62.1% of patients had a systolic blood pressure <140 mmHg, and 82.2% had a diastolic blood pressure <90 mmHg. Blood pressure control according to international guidelines was achieved in 45.0% of all patients. A total of 1515 patients received additional antihypertensive medications, of which angiotensin-converting enzyme (ACE) inhibitors were mostly used (42.2%) followed by beta-blockers (33.7%). Twenty-two patients (0.7%) experienced 27 adverse events. Physicians' assessments of efficacy, tolerability and patient acceptance had ratings of "very good" and "good" in 88.7% (efficacy), 92.8% (tolerability) and 89.1% (patient acceptance) of patients.
  
  
  CONCLUSIONS
  Nifedipine GITS proved to be effective and well tolerated for the treatment of hypertension in 3003 Chinese patients. The results confirm the findings of previously performed clinical studies.
authors.affiliation: Beijing University First Hospital, Beijing, China.
authors.forename: Yong
authors.initials: Y
authors.lastname: Huo
authors.forename: Jian
authors.initials: J
authors.lastname: Zhang
authors.forename: Qing
authors.initials: Q
authors.lastname: He
authors.forename: Hong
authors.initials: H
authors.lastname: Chen
authors.forename: Jishun
authors.initials: J
authors.lastname: Ma
authors.forename: Harald
authors.initials: H
authors.lastname: Landen
mesh_terms: D000368:Aged; D001794:Blood Pressure / Q000187:drug effects*; D002121:Calcium Channel Blockers / Q000009:adverse effects / Q000627:therapeutic use*; D002681:China; D005260:Female; D006801:Humans; D006973:Hypertension / Q000188:drug therapy* / Q000208:ethnology; D008297:Male; D008875:Middle Aged; D009543:Nifedipine / Q000009:adverse effects / Q000627:therapeutic use*; D010045:Outpatients; D017060:Patient Satisfaction; D011358:Product Surveillance, Postmarketing / Q000706:statistics & numerical data
chemical_list: D002121:Calcium Channel Blockers; D009543:Nifedipine