From a 2007 article:
In 2004 a 17-year-old boy in the Japanese town of Gero suddenly ran out of his home and into the middle of a busy street, where he was struck and killed by a truck. In 2005 a 14-year-old boy Chiryu got out of bed, climbed the wall outside his parent's ninth-floor apartment and dropped from the edge. And last month, in two separate incidents, a 14-year old male and a 14-year old female fell to their deaths from their respective high-rise apartment buildings. No one left a suicide note.
What they have in common is that each victim took the influenza antiviral Tamiflu shortly before they died. According to the Japanese Health Ministry, 54 people have died after taking Tamiflu — the drug governments around the world have stockpiled for use against avian flu — since the drug was approved for use in Japan in 2000. Most suspiciously, in multiple cases people, including those cases above, acted erratically after taking Tamiflu. Though the Health Ministry has said there is no clear evidence linking Tamiflu to the deaths, there is growing concern among doctors and parents in Japan over the drug's possible side effects. That is potential cause for concern in the rest of the world, because in the absence of a vaccine, Tamiflu will be the drug of first and last resort in the event of a pandemic.