No clue. I blame docs and druf companies. My best friend needed to take a med to treat his high blood pressure. A side effect was that he would easily become wildly enraged (I saw it, it wasn't pretty) so the doc prescribed some happy pills. Happy pills had some sort of side effect, so the doc prescribed something else. And so on.
My friends bathroom looks like a pharmacy, now. I'd expect it if he was in his 70s or 80s...but the guy isn't even 40 yet. And he's not willing to try another doc, or a different set of meds.
druf compaines = drug companies. Have self-medicated this morning with coffee, yet.
Your friend sounds like he has a Kaiser Permanente doc. That's what a couple of Kaiser docs did with my wife . She ended up with 12 prescriptions to counteract side effects upon side effects before she dumped them all out and decided to just live with the original problem.