【How-to】How fast does lactulose work

While all the new prescription products provide more treatment options, Wald says, most people don’t need them. Instead, over-the-counter drugs such as polyethylene glycol (Miralax and generic), bisacodyl (Dulcolax laxative tablets and generic), or senna (Ex-Lax, Senokot, and generic) are a far better choice.