Would plan b interrupt my other prescribed meds (miralax (polyethylene glycol) and dolcolax)? is it safe to take it while on those meds? will it still work?

Plan B: It is safe to use it. It does not interfere with the medications that you mentioned. It is supposed to be used as a backup only it should not replace using oral contraceptives. It should be used within 72 hours for best result.

Yes: Plan b is a. Progesterone. Miralax (polyethylene glycol) and ducolax are laxatives. I would not take all of these medications together if you want them to work effectively. Hold off on the laxatives for at least 8 hours.