Can miralax (polyethylene glycol) change caliber of stool? Am being treated for constipation. Before miralax (polyethylene glycol) calibur was normal - with miralax (polyethylene glycol) stools are slow and thin.

Oh my... Before you contemplate long term laxative use, seek medical evaluation--rule out metabolic causes of constipation (e.g. Low thyroid or adrenal conditions), distinguish slow versus normal transit constipation, consider a primary rectal dysfunction that may be treatable with biofeedback, check for structural pathology or extrinsic impingement, or intermittent ileus (e.g. Pseudo-obstruction).