Who can and cannot take montelukast

Most adults and children aged 6 months old and over can take montelukast.

Montelukast is not suitable for some people. To make sure it's safe for you, tell your doctor if you:

• have ever had an allergic reaction to montelukast or any other medicine
• have a rare hereditary problem of galactose intolerance (including Lapp lactase deficiency or glucose-galactose malabsorption)