Is it safe too take lorazepam with flexeril?

I assume so as my MD has me on both, 10 mg escitalopram (lexapro) once daily and 10 mg cyclobenzaprine (flexeril) 3 times daily as needed for Back pain/acute muscle spasm. As a suggestion, I would not try it for the first time if I had to drive or watch children or something important as the mix could make you very sleepy.