After a colonoscopy, I asked the gastroenterenologist about taking a laxative and if it would hurt my bowels to take it every day. The answer was no. Plus my PCP and MS Specialist do not have a problem with taking Miralax every day.
Like Dejibo says, it is the stuff used before a colonoscopy just in a lower dose. The powder has no taste other than tap water

...and at Costco, two large bottles cost the same as a bottle at my local grocery store.
Like most laxatives, maybe it works well if taken at night. When I took it during the day, I had embarrassing uncontrollable gas.
It took me three days to get my system going without any stress. And if I miss a day of dosing, no problem.
No stress. I feel the urge but I have learned to be patient. I "do it" like a guy, I have a Sudoku book in the bathroom.
Like Erin says, apples are good and I love prunes. It just adds to the daily nutrition of eating 5 servings of fruits and vegetables in your diet.
But I like the idea of Flaxseed. Maybe I will give that a try. If it does not work for me, I know that Miralax will work again.
But with miralax, give it 3-4 nights before giving up. At least, that is my recommendation.