My gramma hasn't had a bm in 2 weeks!?

She now has hemoroids from trying to go. She is on pain meds becasue of a back injury, so I am thinking thats why she is having troubles going. I told her to go to the pharmacy and get Fleet Phospha-Soda Oral Saline Laxative, she tried that a few times, and nothing. She went to her Dr, who in my opinion got her MD from a crackerjack box, and she told her to take miralax, and that hasnt worked. What can I tell her to do, she is miserable.