I m scheduled for back surgery and as of today had to stop NSAID and aspirin products. I cannot take Tylenol. Mr doctor prescribed Tramadol, which works OK for pain but causes bad constipation. I ll be taking Dulcolax and drinking lots of water -- and there are always prunes, which are very effective for me. Also, I m wondering if medical marijuana would be an optional painkiller, or if it has properties like the ones I must avoid pre-surgery.