My mom has been really constipated for about a month, due to medications she's prescribed to; she's tried alot. what would you recommend?

Clean house.: If necessary, first step is to have a "blow out." which may be manual disimpaction / enema or a cathartic such as magnesium citrate. Afterwards start a program of regular docusate 1 tab twice a day, then add an osmotic agent such as miralax (polyethylene glycol). If necessary add senna, but do not stop the prior agents. The goal is one formed bm/day.