I'm fairly well read on pharmacology due to problems I've had in the past with pharmaceuticals (but also because of my interest in nootropics) and the stuff they'll prescribe to children today I wouldn't touch personally. It's also surprising to me how readily certain pharmaceuticals are prescribed at all given they're not extensively studied in children.
I could give examples, but it's frankly too depressing. But from what I've observed it seems clear to me that we don't have a clear understanding of how long-term use of SSRIs might affect a developing child's brain.