Which antiviral medication indicated for the treatment of influenza is available as a single dose administered orally?

Baloxavir is the antiviral medication indicated for the treatment of influenza that can be administered as a single oral dose. This characteristic is particularly advantageous for patient compliance, as it simplifies the treatment regimen compared to other antiviral medications that typically require multiple doses over the course of several days.

Baloxavir works by inhibiting the cap-dependent endonuclease of the influenza virus, which is crucial for viral replication and transcription. The single-dose formulation effectively lowers the viral load, reduces the duration of influenza symptoms, and can be taken at any time after the onset of symptoms, making it a flexible treatment option.

In contrast, other options like Oseltamivir and Zanamivir require more than one dose over a specified treatment period, while Acyclovir is primarily used for viral infections such as herpes and not for influenza. Therefore, Baloxavir stands out for its ease of administration and effectiveness in treating influenza with a single oral dose, highlighting its utility in clinical settings.