@zakcat Your post caught my eye because I am currently using tramadol for pain from my fractured femur, and trying to take the minimum amount. I just take it in the morning because when I get up the pain is more intense than later in the day.
I googled tramadol and addiction and it is addictive, even in the small quantities prescribed:
https://www.medicinenet.com/tramadol/article.htm#what_is_tramadol_how_does_it_work_mechanism_of_action
JK