Can you take norco and amitriptyline at least 2 hours apart?

Yes you can. I have taken them together. It may increase how tired you feel. The following is what I found in the Interaction Checker.

Interactions between your selected drugs
Moderate
amitriptyline hydrocodone

Applies to: amitriptyline, Norco (acetaminophen / hydrocodone)

Using amitriptyline together with HYDROcodone may increase side effects such as dizziness, drowsiness, confusion, and difficulty concentrating. Some people, especially the elderly, may also experience impairment in thinking, judgment, and motor coordination. You should avoid or limit the use of alcohol while being treated with these medications. Also avoid activities requiring mental alertness such as driving or operating hazardous machinery until you know how the medications affect you. Talk to your doctor if you have any questions or concerns. It is important to tell your doctor about all other medications you use, including vitamins and herbs. Do not stop using any medications without first talking to your doctor.