Tapentadol can change how your lungs and heart work if you take it for a long time. When someone takes too much Tapentadol, they may feel sleepy, have seizures, stop breathing, pass out, have a slow heart rate, or even go into a coma. If the drug is used too much or in the wrong way, it can lead to addiction. People who take a medicine for a long time may develop a tolerance to it, which means...