Hi, my father shouting and speaking in his sleep, having nightmares' after discharge from intensive care. He is 79 years old, diagnosed with stage 5 CKD and he started Hemodialysis a month ago. Also has depression and is on Remeron (Mirtazapine) 15 mg per day and Quetiapine (Seroquel) 50mg per day. Also has Diabetes and is on Lantus insulin glargine injection for blood glucose control. Which medicine could you advise in order to treat nightmares. shouting and speaking in his sleep?

* I have heard about Clonazepam (Klonopin).

Please advise!