27 October 2025
Constipation can be uncomfortable, and sometimes lifestyle changes alone aren’t enough to keep bowel movements regular. In these cases, laxatives can provide short-term relief. Understanding when to take laxatives, the types available, and usage guidelines is essential for maintaining gut health and avoiding complications.
When Should You Consider Using a Laxative?
Laxatives are usually recommended for occasional constipation that doesn’t improve with diet, hydration, or exercise.
They’re mainly used:
- To treat difficulty pooing.
- If you have a condition like an anal fissure, when it helps if your poo is soft or you can poo more easily.
- If you have a condition or are taking any medicine than can cause difficulty pooing – you might be prescribed laxatives to make this less likely.
They may also be used to make sure your bowels are empty before a scan or procedure, such as a colonoscopy.
It’s important to note that laxatives are not meant for long-term management of chronic constipation. Persistent issues should be evaluated by a healthcare professional.
Types of Laxatives Available in New Zealand
There are several types of laxatives available, each working in a different way:
Bulk-Forming Laxatives
These contain fibre that absorbs water and increases stool bulk, helping it pass more easily. They are generally okay to be used long-term but require adequate fluid intake.
Stool Softeners
These help soften the stool by drawing water into it, making bowel movements easier and less painful. They are gentle and often recommended for people with hard stools or after surgery.
Stimulant Laxatives
Stimulants, like senna, increase intestinal muscle contractions to move stool along. They are effective for short-term relief but should not be used continuously, as overuse can cause dependence.
Osmotic Laxatives
These work by drawing water into the bowel, softening stool and increasing bowel movement frequency. They are useful for short-term relief of constipation and can be effective when lifestyle changes are insufficient.
How Often Can You Use Laxatives?
New Zealand health guidelines advise using laxatives as needed for short periods only and for a maximum of 5 to 7 days in a row.
Always read product instructions carefully and consult a GP if symptoms continue.
Tips for Effective Laxative Use
- Start with lifestyle changes first: Increase fibre, fluids, and activity.
- Choose the right type: Bulk-forming and stool softeners are gentler and suitable for longer use, while stimulants should be occasional.
- Stay hydrated: Laxatives are more effective when you stay hydrated.
- Follow dosage instructions: Never exceed recommended doses.
- Monitor your bowel habits: If constipation persists for more than a week, seek medical advice.
By understanding when to take laxatives and how to use them, you can manage occasional constipation effectively while protecting long-term digestive health.
This information is provided for general educational purposes only and is not intended to constitute medical advice, diagnosis, or treatment. Speak with your healthcare professional for advice that reflects your individual health needs.