HAs anyone had any interactions with ultracet and flexeril? I take the flexeril at night for muscle spasms, and the ultracet for pain as needed. I try not to tak it often, no more than once a week or so. I have also been taking a multi vitamin, 5 HTP, fish oil, Sam-e, and glucosamine. I checked the Medscape interaction tool, but I must confess I didn't understand the interaction warning, too much Dr. speak. Need it in normal language. any help would be appreciated.