Laxatives can cause side effects, which vary between the different types.

For example:

• bulk-forming laxatives can cause bloating and flatulence (wind)
• stimulant laxatives can cause abdominal (tummy) pain; using them for long periods of time can result in a weakened or 'lazy' bowel
• osmotic laxatives can cause abdominal pain, bloating and flatulence
• stool softener laxatives can cause abdominal cramps, a feeling like you are going to be sick (nausea) and a skin rash

Make sure you stay well hydrated when taking laxatives by drinking plenty of fluids. At least two litres (six to eight glasses) of water a day is recommended.

Less common side effects include:

• being sick (vomiting)
• dizziness - do not drive or use tools or machinery if you feel dizzy
• passing blood out with your stools
• fainting 

If you experience any of these less common side effects then stop taking the laxatives and contact your GP for advice.

Avoiding long-term use

In most cases, you should only take laxatives occasionally and on a short-term basis. Using laxatives frequently or every day can be harmful.

Using laxatives on a long-term basis can make your body dependent on them, so your bowel no longer functions properly without the medication.

Overusing laxatives can also cause:

• diarrhoea 
• dehydration 
• unbalanced levels of salts and minerals in your body

If you need to use laxatives more regularly, or if you have been taking them for more than a week, see your GP for advice.