Hello. This is Kitt. First of all I suggest you call your prescribing physician to ask this question. I can give you this information but remember I am not a professional. I do understand your needing something for pain.
Flexeril can cause side effects that may impair your thinking or reactions. Be careful if you drive or do anything that requires you to be awake and alert.
Avoid using other medicines that make you sleepy (such as cold medicine, pain medication, muscle relaxers, and medicine for depression or anxiety). They can add to sleepiness caused by Flexeril.Avoid drinking alcohol, which can increase some of the side effects of Flexeril. Reference:Pocket PDR 7th Edition