Korean J Intern Med.  2018 Jan;33(1):91-101. 10.3904/kjim.2016.111.

Large-scale surveillance study of the safety and effectiveness of entecavir in Korean patients with chronic hepatitis B

Affiliations
  • 1Department of Internal Medicine, College of Medicine, The Catholic University of Korea, Seoul, Korea.
  • 2Neane Clinic, Seoul, Korea.
  • 3Bristol-Myers Squibb, Seoul, Korea.
  • 4Bristol-Myers Squibb, Wallingford, CT, USA.
  • 5Department of Internal Medicine, Yeungnam University College of Medicine, Daegu, Korea. heonjulee@yu.ac.kr

Abstract

BACKGROUND/AIMS
Entecavir (ETV) is effective and safe antiviral agent against hepatitis B virus (HBV) in clinical and real-world setting but, most studies were performed in single institute or have limitation in patient's number. A large-scale nation-wide real-world surveillance study was carried out to investigate safety, efficacy and clinical effectiveness of ETV in Korean patients with chronic hepatitis B (CHB).
METHODS
Between 2006 and 2012, 3,444 patients were enrolled from 132 Korean institutions. For the safety assessment, investigators recorded the occurrence of observed and patient-reported adverse events (AEs), as well as laboratory abnormalities. Efficacy, which consisted of change in HBV DNA and alanine aminotransferase (ALT), was evaluated in patients who had received at least 16 weeks of ETV treatment. Overall clinical effectiveness, based on improvement of ALT, HBV DNA and patient's symptoms, was evaluated by physicians.
RESULTS
Of the patients, 3,367 were evaluated for safety and 3,115 for efficacy and clinical effectiveness. Three hundred and eighty AEs were reported in 255 cases (7.57%), and 67 adverse drug reactions in 54 cases (1.6%). Serious AEs (SAE) were 19 events in nine cases (0.27%). Serious adverse drug reactions (SADR) were three events in two cases (0.06%), and unexpected SAE/SADR were three events in two cases (0.06%). Medical history and concomitant medications were factors inf luencing incidence rates of AEs. Overall clinical effectiveness rate was 96.53%, which was clinically assessed as marked improved or improved state.
CONCLUSIONS
This study showed that ETV was well tolerated and clinically effective in Korean patients with CHB in a real-world nation-wide setting.

Keyword

Drug-related side effects and adverse reactions; Product surveillance, postmarketing; Entecavir; Hepatitis B, chronic

MeSH Terms

Alanine Transaminase
DNA
Drug-Related Side Effects and Adverse Reactions
Hepatitis B virus
Hepatitis B, Chronic*
Hepatitis, Chronic*
Humans
Incidence
Product Surveillance, Postmarketing
Research Personnel
Treatment Outcome
Alanine Transaminase
DNA
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