Flexeril is one if my favorite sleeping pills. Don't even use it for my back really because you become more tolerant to the knockout effect, when combined with Melatonin it works quicker. My girl usually takes half one and sleeps good and her neck is better, she never tried it and was amazed how much it helped het neck pain when i gave it to her. I have to ask my doctor for more, this bottle of 60 i had lasted a year. She is a lightweight and take a pill and make three from it. I only take it once in a blue moon.