Senna Laxative: How to Use This Traditional Herb Safely

Senna is one of the oldest and best-known herbal laxatives in the world. Its leaves and pods come from Senna alexandrina, a shrub native to North-east Africa and the Arabian Peninsula. Because a senna laxative works so reliably, it is important to know how to use it safely.

A long history

Arab physicians described senna more than a thousand years ago. Later, traders shipped it through the port of Alexandria, which is where the name Alexandrian senna comes from. Over the centuries, it became part of European, Middle Eastern and Indian herbal practice.

Today, senna is still widely used. In fact, sennosides, the main compounds in senna, are an approved active ingredient in many nonprescription laxatives in the United States.

How a senna laxative works

Sennosides pass through the stomach and small intestine largely unchanged. Then, in the large intestine, gut bacteria convert them into active compounds. These compounds stimulate the muscles of the colon, which encourages a bowel movement. For this reason, senna is known as a stimulant laxative.

Because of this action, a senna laxative usually works within several hours. It can also cause cramping or loose stools, especially at higher amounts.

Using senna safely

Senna is meant for short-term use. Do not use a senna laxative for more than a week unless a healthcare professional advises it. Long-term use can upset the body's fluid and electrolyte balance, so it is not a daily, ongoing habit.

In addition, avoid senna if you have abdominal pain, nausea or vomiting, or a sudden change in bowel habits. Stop and speak with a healthcare professional if you notice rectal bleeding. Do not give senna to children, and ask a professional first if you are pregnant, nursing or taking medication.

Reading a label that contains senna

First, check whether senna is listed in the ingredients, because it sometimes appears in blends and teas without much attention. Next, look for the serving size and clear short-term directions. Finally, make sure the label includes stimulant laxative warnings.

Our Soursop Bitters contains senna alongside soursop, sea moss, turmeric and ginger. That is why we describe it as a short-term product and publish its senna warnings clearly on the product page.

Explore the related ASPHODEL products: ASPHODEL Soursop Bitters. You can also browse every ingredient in our library. For the botanical details, see the full ingredient profile.

Further reading: Senna alexandrina (Wikipedia)