I can tell you what the drug book says, but it won't help lot I'm afraid.
Action of Ultram: Unknown. A centrally acting synthetic analgesic compound
not chemically related to opiates. Drug is thought to bind opiod receptors
and inhibit re-uptake of norepinephrine and serotonin.
Lay-mans terms- non-narcotic but they don't know why it works.
It does help pain and is not addicting. Have a chat with your
pharmacist-they could tell you a lot more.
Sincerely,
Deb