Tramadol
Tramadol is a centrally acting analgesic with two mechanisms: it is a weak agonist at opioid mu receptors and it also inhibits the reuptake of serotonin and noradrenaline in descending pain pathways. Together these dampen the transmission of pain signals in the spinal cord and brain. It is used for moderate pain that milder painkillers do not control.
It can be taken with or without food, and drowsiness, dizziness and slowed reactions are common at the start and after any change, so driving and machinery are unsafe until the effect is known. Alcohol adds to that sedation and to the risk of depressed breathing and must be avoided. The serotonin component means that antidepressants such as sertraline, venlafaxine, duloxetine and amitriptyline raise the risk of serotonin toxicity and of seizures, since tramadol lowers the seizure threshold on its own. Tolerance and physical dependence develop with continued use, so length of treatment and how it ends are decisions for the prescriber.
A seizure, or agitation with fever, sweating, shivering and muscle jerks, is an emergency. Very slow or shallow breathing, extreme sleepiness or confusion needs urgent care, and craving, escalating use or withdrawal symptoms between doses are reasons to see a doctor.
Reference information, not medical advice. Discuss any change with your doctor.