Final answer:
Oseltamivir (Tamiflu) effectively shortens the duration of Type A influenza symptoms by 1 or 2 days, is administered orally, and is suitable for use in pediatric patients, including a 3-year-old with asthma.
Step-by-step explanation:
For a 3-year-old male with moderately persistent asthma who has been diagnosed with Type A influenza, oseltamivir (Tamiflu) is a recommended treatment. Oseltamivir works by inhibiting the viral neuraminidase enzyme, preventing the release of virus from infected cells and can shorten the duration of influenza symptoms by 1 or 2 days. It is important to note that while oseltamivir is effective, it does not prevent symptoms entirely. Also, oseltamivir is administered orally and is not contraindicated in pediatric patients; hence, it is a suitable antiviral medication for the young patient in question.