In recent years there have been case reports of psychiatric events generally occurring within 48 hours of the start of treatment especially among children younger than 16.
Review: No Tamiflu-mood disorder link
April 10, 2009
However, the report in the International Journal of Clinical Practice found, in people 17 or younger, the rate of "episodic mood disorders" was higher in those who took Tamiflu than those who did not.