Overview
It's also used in some bowel preps before colonoscopy.
What it's used for
- Occasional constipation
- Bowel prep (as directed)
How to take it
- Swallow tablets whole; don't take within 1 hour of milk or antacids.
- Don't use longer than 1 week unless a provider says to.
Your dose depends on your health and other medicines. Always follow your prescription label, and ask your pharmacist if anything is unclear.
Side effects
Common side effects
- Belly cramps
- Diarrhea
- Rectal burning (suppository)
Warnings
- Don't use with belly pain, nausea, or vomiting unless a provider says to.
Other medicines, foods, and alcohol
- Milk, antacids, and PPIs can make tablets dissolve too early.
Tell your provider and pharmacist about every medicine, vitamin, and supplement you take.
Pregnancy and breastfeeding
Ask your provider.
Missed doses, overdose, and storage
If you miss a dose
This medicine is often taken only when needed. If you take it on a schedule, take a missed dose when you remember, unless it's almost time for the next one. Don't double up.
If someone takes too much
Call Poison Control at 1-800-222-1222 or get help online at poison.org. Call 911 if the person collapses, has a seizure, has trouble breathing, or can't be woken.
Storing it
Store at room temperature, away from heat and moisture (not in the bathroom), and out of reach of children and pets.
Conditions it's used for
Sources
- DailyMed: FDA drug label for Bisacodyl (U.S. National Library of Medicine)
- MedlinePlus: Drugs, herbs, and supplements
- FDA: Drugs@FDA
Last updated 2026-11-13.