Professor Si Chongwen, Guest Commissioner of branch department of infectious and verminosis diseases of Chinese Medical Association and an expert of viral hepatitis for the advisory committee of the Ministry of Public Health, says that Adefovir Dipivoxil is an orally-taken drug to cure viral hepatitis. More than 8,000 clinical experiments conducted worldwide showed that it can effectively and rapidly inhibit the virus, and that the virus carried in the blood serum decreased ten thousand times within one year after the treatment therefore can greatly improve key indexes concerning such things as liver tissue, biochemistry and blood serum. Hepatitis B patients of various kinds such as e-antigen plus and e-antigen minus patients, patients receiving preliminary treatment and old patients, and those resistant to drugs all can benefit from this drug. Adefovir Dipivoxil is effective to treat such case as with stubborn drug resistant phenomena that will show itself quite late. Furthermore, it can be used with other anti-viral drugs without causing any cross drug-resistant phenomena.