I’m asking because my dad has been on Zoloft for 4 years. He recently broke his pelvis and spent 5 weeks in rehab. He’s now back in his AL apartment with OT and PT. Since he’s been back he’s been exhibiting old behaviors from before he was on Zoloft. Very angry, mean and belligerent. I’m wondering what’s going on. He’s still having some pain and is using a narcotic pain reliever. Ideas or thoughts? It’s so sad, frustrating and stressful. He has vascular dementia.