Tramadol interacts, potentially fatally, with such serotonergics, monoamine oxidase inhibitors, tricyclic antidepressants, selective serotonin reuptake inhibitors, serotonin-norepinephrine reuptake inhibitors, noradrenergic and specific serotonergic antidepressants, serotonin antagonist and reuptake inhibitors, certain analgesics (pethidine (meperidine), tapentadol, oxycodone, dextromethorphan and fentanyl), certain anxiolytics (such as the SSRIs and buspirone), certain antibiotics (namely, linezolid and isoniazid), certain herbs (e.g. St. John's wort, passiflora, etc.), amphetamines/subtituited amphetamines, phenethylamines/substituited phenethylamines, phentermine, lithium, methylene blue as well as numerous other therapeutic agents.
Both are opiod painkillers... tramadol/tramacet is a 'lesser percocet'. Both can cause drowsiness, so if you are driving yourself to PT I would recommend waiting until after, as you are not supposed to take them and operate 'heavy machinery' (vehicles included). Definitely talk to your doctor/pharmacist.