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Heritage Remedies

Black Draught and Senna: What to Know About Occasional Constipation

Black Draught is a traditional laxative name. Learn how senna works, how long it usually takes, and when constipation needs a pharmacist or doctor's help.

Black Draught is a name people often remember from home. Oakhurst currently lists a Black Draught Senna Laxative product, but its online description does not provide enough information to substitute for the Drug Facts on your bottle. Oakhurst product listing

Senna is a stimulant laxative used for short-term constipation relief. It increases intestinal activity to help produce a bowel movement. MedlinePlus includes Black Draught among senna brand names. MedlinePlus: Senna

How long does it take to work?

Senna usually works within six to twelve hours. That is an expected range, not an exact deadline. Follow your package directions rather than taking extra tablets because you have not had an immediate result. MedlinePlus: Senna

Check the strength and serving instructions before comparing it with another brand. The number of tablets someone else takes may not match your product.

Can I take it every day?

Do not continue self-treatment for more than a week without talking with your clinician. If it does not produce a bowel movement, seek advice rather than repeatedly increasing the amount. Longer use may sometimes be part of an individual treatment plan; that plan should come from the clinician managing the problem. MedlinePlus: Senna

If constipation keeps returning, the next step is finding out why. A familiar laxative can be convenient, but convenience does not explain a change in bowel habits.

Could my medicines be contributing?

Yes. Iron supplements, opioid pain medicines, some antacids, and certain other medicines can contribute to constipation. Changes in routine, food, fluids, or activity may also play a role. A medication review can help identify what needs discussion with your prescriber. NIDDK: Causes of constipation

Bring your complete medication list, including the OTC products you use only occasionally. That is more useful than trying one laxative after another without reviewing the pattern.

What side effects or warning signs matter?

Senna may cause cramps, nausea, or abdominal discomfort. Rectal bleeding means stop and contact your doctor. Discuss pregnancy, breastfeeding, other medicines, and use in older adults with a healthcare professional. MedlinePlus: Senna

Get medical help promptly for constipation with constant abdominal pain, inability to pass gas, vomiting, blood in the stool, fever, or unexplained weight loss. These symptoms should not be managed by simply adding more laxative. NIDDK: When to seek care

Bring your questions to Fairview

Tell our pharmacist how long the constipation has lasted, what you have tried, and which medicines you take. We can help you read the current label and decide whether to discuss a different plan with your clinician. Call 601-544-4871 or visit Fairview Pharmacy in Hattiesburg. Ask staff to confirm the exact product and availability.

General education only. This article does not provide a dose for an unverified Black Draught formulation.

Medically reviewed by Mike Acheampong, PharmD

Last reviewed September 24, 2026

This article is for educational purposes and does not replace personalized advice from a licensed healthcare professional. Always read product labels and consult your pharmacist or physician before starting, stopping, or combining medicines.

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