Can i take 5 doses of miralax if i am severely constipated?

Dose-dependent drug: Doctors define constipation as stools less frequently than once every 3-4 days. Patients feel they are "constipated" when passing hard or small volume stool, or they feel full & bloated. We can't tell from your question if this is a one-time problem or a recurrent and progressive one. Also, we don't know if you're blocked, if your gut is sluggish, or your rectum works correctly. Consult your doc.