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Senna: uses, side effects & brands
Senna is a plant-based stimulant laxative for short-term constipation. It belongs to the Laxative & bowel (IBD) medicine group. These relieve constipation or treat inflammatory bowel disease.
Drug type — dosing is set by your doctor
| Measure | Range |
|---|---|
| Drug class | Laxative & bowel (IBD) medicine |
| Type | Prescription |
| Dose | Individual — ask your doctor or pharmacist |
What it is used for
- Short-term relief of occasional constipation
- Constipation caused by medicines such as strong painkillers (opioids)
- Sometimes part of bowel preparation before tests
Common brand names
- India: Softovac (combo), Sofsena
- Worldwide: Senokot, Ex-Lax
Common side effects
- Tummy cramps
- Diarrhoea
- Harmless reddish or brown discolouration of urine
- Low potassium with long or heavy use
Before taking it — precautions
- Do not use if you have a bowel blockage, unexplained tummy pain or inflammatory bowel disease
- Avoid long-term regular use unless your doctor advises it
- Ask before use in pregnancy, breastfeeding or for young children
When to see a doctor urgently
- Severe or ongoing tummy pain (urgent)
- Bleeding from the back passage
- Severe diarrhoea with weakness or dizziness
Not a prescription — no dose shown. The right dose of senna depends on age, weight, kidney/liver function and the condition, so MedDroid does not show a dose here. Always get your dose from a doctor or pharmacist and the leaflet inside the pack. General educational information only.
Frequently asked questions
How long does senna take to work?
It usually works within about six to twelve hours, so it is often taken at bedtime.
Can I take senna every day?
It is meant for short-term use; regular long-term use should only be under a doctor's advice.
Why is my urine a different colour?
Senna can colour urine reddish-brown; this is harmless and goes away after stopping.
Explore more
Sources & further reading
- World Health Organization (WHO)
- MedlinePlus — U.S. National Library of Medicine
- Ministry of Health & Family Welfare, India
- Indian Council of Medical Research (ICMR)
Reviewed by Dr. Sanjay Anbu, MBBS. MedDroid is an AI medical assistant and can make mistakes. It provides general health information, not a diagnosis or medical advice — always consult a qualified clinician. In an emergency, contact your local emergency number immediately.