I've been on Zanaflex for about 2 weeks now. Soma and Flexeril have no effect for me anymore. I'm a bit odd as most drugs at normal doses don't make me drowsy. Zanaflex at 4mg doesn't but it does at 8mg. No real side effects for me at 4mg but I have very vivid dreams at 8mg (kinda cool side effect if you ask me). As my symptoms are worsening, 8mg is only keeping me asleep 2-3 hours now and not offering me much tension relief anymore.