Tramadol is also an opioid but slightly different from codeine and morphine. Tramadol is a synthetic opioid and also has additive action that helps in pain relief. And yes basically you can have a reaction similar to morphine or codeine as tramadol is also a form of opioid. You can discuss the above information along with your reaction to your doctor. I hope it helps. Thanks for writing into healthcaremagic. Have a wonderful day.