text: absolutely any derivative of the codeine molecule can make you have a limp stick just like any derivative of the morphine molecule can cause the same thing.  Tramadol Which is generic Ultram is similar to dextromethorphan. it is the codeine molecule with a twist here and there of the chain, making is less addictive, longer acting, etc.  You can actually take those two together and get a synergistic response (1+1=3)