Maybe they are, maybe they aren't. Proof is required.
Now, I'm not going to argue that there can't be rare side effects that are only discovered with time. I'm also not going to claim that the original trials were perfect, or that research into the question isn't justified. But you're trying to assert that they didn't test for safety, and that's just factually incorrect.
Whether those harms outweigh the benefits overall remains to be seen and likely will never be known unless it's really really bad, which is likely not the case here.
I'd agree more research is probably justified, but there's likely little profit in it for anyone.
There have been over 30 randomized controlled trials of this drug, and the author picked only eight papers, none of which were randomized, none of which were controlled, and all of which were based on mining self-reported data from patient databases.
Come now.
There is no current listing for suicide, suicidal ideation, etc.
[1] https://www.accessdata.fda.gov/drugsatfda_docs/label/2012/02...
[2] "Because these reactions are reported voluntarily from a population of uncertain size, it is not always possible to reliably estimate their frequency or establish a causal relationship to drug exposure"