Does Morphine Sulfate cause insomina? Sister has been on it for awhile, up for 48 or so hours, sleeps 24-ish. Went to see doctor yesterday and he increased the dose of Morphine and gave her temasapam 30mg for sleep. Last nite was a nightmare. She increased the dose of Morphine, and incoherant, hallucintating, fell, I was afraid to go to sleep myself.