How Does It Work?Tyzeka is an antiviral medication. It works by preventing viral cells from multiplying in the body. It does this by blocking a process that the virus needs in order to multiply.
When the HBV infects a person, it uses the person's own cells to reproduce. However, HBV's genetic information is in the form of RNA, not DNA (like people). So, the virus must first convert its genetic material from RNA to DNA. A special protein called the reverse transcriptase enzyme is necessary for this conversion to occur.
Tyzeka resembles building blocks (known as nucleotides) that reverse transcriptase uses to convert RNA into DNA. However, it is just different enough that when used to create DNA, Tyzeka actually stops the DNA from being made. Without DNA, the virus cannot multiply.