http://en.wikipedia.org/wiki/Cyclobenzaprine
Cyclobenzaprine is generic Flexeril .
I've had to be on this as Flexeril before my spine became so unstable I had to have surgery.
I, too, was a heroin addict for many years & found this (Flexeril) to be a safe medication with NO "high" or withdrawals.
Often, doctors utilize these types of medicines for people who have severe muscle tension creating enough discomfort to interfere with normal sleep patterns. As we sleep better, our bodies & minds heal. The sleep does allow me to make good decisions.
I hope this helps
