bisacodyl vs senna
PlainMeds reviewed this comparison against our methodology in August 2026. It places FDA and CMS record fields side by side, without recommending either medication.
Side-by-side comparison of bisacodyl and senna. Data from FDA drug databases (Orange Book, NDC Directory, recalls, shortages) covering 20,000+ approved drugs, plus CMS pricing; see our methodology.
Bisacodyl is a medicine that helps you have a bowel movement. It is a stimulant laxative.
Senna (Senokot) is a stimulant laxative. It helps relieve constipation and usually causes a bowel movement in 6 to 12 hours.
Bisacodyl treats constipation, which means you are having trouble passing stool. It helps your bowels move so you can have a bowel movement. It is available as a suppository.
Senna treats occasional constipation, which means you have trouble having bowel movements. It helps your bowels move if you are irregular. This medicine usually works within 6 to 12 hours.
Bisacodyl works by stimulating the bowel muscles. This stimulation causes the bowels to contract. The contractions help to push stool out of the body.
Senna is a stimulant laxative. It works by stimulating the muscles in your intestines. This helps to move stool through your body.
- • Abdominal pain
- • Diarrhea
- • Nausea
- • Vomiting
- • Headache
- • Diarrhea
- • Abdominal pain
- Constipation 1,509
- Nausea 1,358
- Pain 1,115
- Vomiting 985
- Fall 837
- Nausea 1,390
- Fatigue 1,358
- Constipation 1,157
- Dyspnoea 1,093
- Diarrhoea 1,064
No specific warnings noted.
No specific warnings noted.
It is not known if bisacodyl is safe to use during pregnancy or while breastfeeding. Talk to your doctor before using this medicine if you are pregnant or breastfeeding.
It is always best to talk to your doctor before taking any medication during pregnancy or breastfeeding. They can help you weigh the risks and benefits.
How to Read This bisacodyl vs senna Comparison
bisacodyl is classified in the Stimulant Laxative drug class, while senna sits within the Stimulant Laxative class. Because both drugs share the same classification, they are often considered interchangeable in theory, but clinical outcomes rarely track that cleanly. Both drugs are available over the counter.
Adverse event totals above are pulled from the FDA's Adverse Event Reporting System (FAERS). For these top-ranked reactions alone, bisacodyl has 5,804 submissions while senna has 6,062. Those figures reflect cumulative reporting volume, not per-patient risk, so older, widely dispensed drugs typically look worse on count alone. No direct interaction between these two drugs is listed in our FDA-derived dataset, though co-prescription still warrants pharmacist review. Serious warnings, pregnancy guidance, and contraindications can differ even when indications overlap.
A table cannot represent individual circumstances. Data here is sourced from FDA Structured Product Labels (SPL) and FAERS, both of which update as manufacturers and clinicians submit new information. This registry does not provide medical, treatment, substitution, or medication-change directions for bisacodyl or senna.
Registry boundary: This comparison displays source-record fields and does not provide individualized medical direction.