Aminosalicylates (5-ASAS)

This information sheet is a brief overview of aminosalicylic acids, also known as 5-ASAs, which are used to treat Ulcerative Colitis and Crohn’s Disease (the two main forms of Inflammatory Bowel Disease - IBD). It's about 5-ASAs in general and is not intended to replace specific advice from your doctor or any other health professional.

For further information please talk to your doctor or specialist IBD team, or look at the information sheet supplied with your medication or from the website:

Why am I being treated with this medicine?
Other names for this medicine
How does it work?
Does it matter which type of 5-ASA I have?
How do I take 5-ASA?
What is the normal dosage?
How long will it take to work?
How long will I be on 5-ASA
How effective are 5-ASA?
What checks will i need on 5-ASA?
What are the most likely side effects on 5-ASA?
Can I have immunisations while on 5-ASA?
Can I take other medicines along with 5-ASA?
Can I drink alcohol while taking 5-ASA?
Do 5-ASAS affect fertility?
Can I take 5-ASA while pregnant or breastfeeding?
Who should I talk to if I am worried?
Help and support from Crohn's & Colitis UK
How we write our information

Last reviewed: November 2017