what size bottles does miralax come in
3 Days Before Your Procedure. We want your procedure to go as smoothly as possible. In order for that to happen, there are some tips. we have included in this bowel prep sheet. Now, hereâs what to do to get ready: * Obtain Miralax (Polyethylene Glycol) from your pharmacy. It comes in a 8.3 oz (238 gm) bottle. Generic equivalent is ok. No prescription is needed. * Obtain Dulcolax laxative (not stool softener) from your pharmacy. You need a total of 4 Dulcolax laxative tablets.