What if

What if an anti-depressant medication malfunctioned on a couple people in a thousand? And of those two one became so depressed she committed suicide? It would be pretty easy for a drug company to pay PR people to spin that so the public heard it as "Joe Doe was taking anti depressants and killed himself." That has implied-cause effect relationship. Makes sense though---99.98% of people react one way...and that is get happier. And .02% react another way...which is to get sadder. Well what if 50% of those sadder ones (.01%) of the whole kill themselves?