I found the new inulin fibers are easiest to take. Or, you can try
flaxseed meal. Or, you can try Metamucil or Citracel. Just take the fiber. You need to try a laxative, too. It's not one or the other--it's both. Try Miralax. If you don't like it in water, try apple juice. I find that Miralax is suitable in plain water, though. Make sure you drink loads and loads of water.