There’s an obvious link, but not a lot of research into the mechanics. Just read the labels or the black box on these drugs. They probably do help a lot of people, but in some small fractions of a percentage of people who take them it creates suicidal and/or homicidal ideation. So give them to millions of people and you’re gonna get a few dozen or so who go crazy. Not enough study between the link and the mechanism; and perhaps since they are so often just routinely prescribed not enough follow-up examination on whether they are actually helping (most of the time, I presume) or hurting (rarely) the patient.
Just my 2 cents.
What I see is a move by feds to make antidepressants into controlled substances and allow the DEA state med boards and other anti-gun agencies to follow people on them and use as a pretext for red flag gun confiscation.