I couldn't sleep for more than three hours for years. My current Dr. prescribed , trazadone. It's a very good pill that is very cheap with little side effects. It helps me every night , and I've taken it for 6 years. I used to get up and clean the house and sweep at night. Hubby can sleep through anything.
It wasn't working for me. I was never alert, and had trouble during the day. He prescribed this pill, and that was such a change for me, and hubby. If staying up at night starts to cause you trouble, you may want to talk to your Dr. My dad never slept for more than 3 or 4 hours. I think those things may be passed down to family members.