My WebMD Sign In, Sign Up

Ask Your Question

WebMD Answers

120 Characters remaining
120 Characters remaining
  • First, try and keep your question as short as possible.
  • Include specific words that will help us identify questions that may already have your answer.
  • If you don't find your answer, you can post your question to WebMD Experts and Contributors.


Posted: | Report This Report Question |

Answers From Experts & Organizations (1)

Primary Care
6,467 Answers
73,418 Helpful Votes

That would depend on the laxative type and dosage. Most laxatives act relatively quickly and then dissipate. Some pledge to "work by 8AM the next morning" if taken at night. I guess that would be good as long as you don't oversleep!

The only longer lasting laxatives would be the bulk types, like those containing methylcellulose and other undigestible fiber.

Some laxatives are quite potent and will literally purge the colon. These are called cathartics. These are best to avoid unless you are preparing for a colonoscopy.

This answer should not be considered medical advice...down arrowThis answer should not be considered medical advice and should not take the place of a doctor’s visit. Please see the bottom of the page for more information or visit our Terms and Conditions.up arrow

| Report This Report Answer

Was this helpful?


Thanks for your feedback.

25 of 71 found this helpful