› Singulair (Montelukast) contains aspartame (phenylalanine). People who have phenylketonuria (PKU) can't break down the amino acid phenylalanine. It builds up and causes serious medical problems. If you have PKU, don't use this product.
No food related info.
Kidneys and liver
› There are reports of liver injury in people taking Singulair (Montelukast) mostly in combination with other factors such as drugs, alcohol, and liver disease. If you have any of these risk factors, your doctor will need to check your liver function periodically.
No kidneys and liver related info.
Upsides and benefits
› Prevents symptoms and improves lung function in children and adults with chronic asthma.
› A single 10 mg dose improves exercise-induced asthma symptoms for up to 24 hours.
› Fewer side effects compared to other asthma treatments.
› Also relieves nasal allergy symptoms.
› Effective pill alternative to corticosteroid inhalers.
Downsides and risks
› You have to use Montelukast every day to control your symptoms.
› Somewhat less effective than corticosteroid inhalers for asthma.
› There's no generic available, so it can be expensive.
› Can cause behavior changes, agitation, aggression, and difficulty sleeping for some people.
Tips from our pharmacists for people taking the medication
› Take it once a day to control asthma and allergy symptoms.
› If you're using it for asthma or allergies, take it in the evening.
› Use it 2 hours before exercising.
› Granules can be taken by mouth or dissolved in liquid or soft food.
› Doesn't treat sudden wheezing or asthma attacks once they start. Keep a fast-acting (rescue) inhaler with you.
› The chewable tablets contain aspartame, so don't use them if you have a sensitivity to phenylalanine or phenylketones.