Compensated Liver Disease: The most common adverse reactions of any severity which at least have possible association with study drug for patients who are treated with Entecavir monohydrate, are headache, fatigue, dizziness, and nausea. Clinical side effects of moderate-to-severe intensity (degrees 2-4) * can be seen in the following table: See Table 2.

Including events that can occur, may occur, certain events or relationships that do not known on the treatment regimen.
Exacerbation of Hepatitis after Discontinuation of Therapy: If Entecavir monohydrate is stopped regardless of therapeutic response, the rate flares post-therapy may be higher.
Decompensated Liver Disease: In patients receiving Entecavir monohydrate, the side effects most commonly present with treatment of all levels of severity, regardless of causality, occurs up to week 48 is peripheral edema, ascites, pyrexia, hepatic encephalopathy, and upper respiratory tract infection.
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