Ok so my sister has bad back pain and gets prescribed Robaxin 750mg and Percocet 5, she woke up this morning and took one 5 with a cup of coffee then took four 750 but spaced it out a little then took 4 !/2 Percocets with a little space in between them and drank a cup of coffee, I was just wondering if thats ok or should I be worried? I don't know to much about drugs so I just want to make sure that everything is ok.