Tramadol is a medication that is used to treat moderate to moderately severe pain. It is a synthetic opioid analgesic, which means it acts on the opioid receptors in the brain to relieve pain.

Tramadol works by binding to mu-opioid receptors in the brain and by inhibiting the reuptake of two neurotransmitters, serotonin, and norepinephrine. This dual mechanism of action contributes to its pain-relieving effects.