Hi, I Am Working With A Back Strain And Am

Hi, I am working with a back strain and am taking muscle relaxers 3/day and 600mg/motrin 3x/day. I ahve been waking up about every hour and a half to two hours like clockwork during these last two weeks. Is this a by-product of the medicine for the back sprain? Should I be taking a supplement to help with sleep? I am finding myself really sleepy after lunch and fall asleep once I get home from work.