What is the treatment of choice for a patient with confirmed Influenza B?

Oseltamivir (Tamiflu) is the treatment of choice for confirmed Influenza B because it is an antiviral medication specifically designed for the treatment of influenza viruses, including both Influenza A and B. It functions by inhibiting the neuraminidase enzyme, which is essential for the viral replication process. By blocking this enzyme, Oseltamivir prevents the virus from spreading to healthy cells within the respiratory tract, thereby reducing the severity and duration of the influenza illness when administered early in the course of the disease.

In contrast, Amantadine (Symmetrel) is primarily effective against Influenza A and is not recommended for Influenza B. Acyclovir (Zovirax) is an antiviral used to treat herpes viruses and has no activity against influenza viruses. Nevirapine (Viramune) is an antiretroviral medication used in the treatment of HIV and does not have any effect on influenza viruses. Therefore, Oseltamivir stands out as the appropriate choice for treating Influenza B specifically.