Singulair (Montelukast) – What You Need to Know

If you’ve been prescribed Singulair, you probably wonder why this little tablet is part of your asthma or allergy plan. In simple terms, Singulair contains montelukast, a drug that blocks chemicals called leukotrienes which cause airway swelling and nasal congestion. By stopping those chemicals, the medicine helps keep breathing smooth and reduces sneezing.

How Singulair Works

Leukotrienes are released when your body reacts to an allergen or irritant. They tighten the muscles around your airways, make mucus thicker, and trigger inflammation. Montelukast sits in the receptors where leukotrienes would bind, so they can’t cause trouble. The result is a steadier airway that’s less prone to asthma attacks or hay‑fever flare‑ups.

Because it works at the chemical level rather than opening airways like a rescue inhaler, Singulair is used for long‑term control—not sudden relief. That means you take it every day, even when you feel fine, to keep symptoms in check.

When to Take Singulair

The usual adult dose is one 10 mg tablet taken at the same time each day, preferably in the evening. Kids get a lower dose based on weight, and there are chewable or granule forms for younger children. Taking it with food isn’t required, but some people prefer it with dinner to avoid an upset stomach.

If you miss a dose, just take it as soon as you remember—unless it’s close to your next scheduled dose. In that case, skip the missed one and continue with your regular timing. Don’t double‑up; extra doses won’t help and could raise side‑effect risk.

Most doctors start Singulair when a patient has frequent asthma symptoms (more than twice a week) or persistent allergic rhinitis. It’s also common for people who need to cut down on inhaled steroids, because it can lower the overall medication load.

Common Side Effects

The good news is that many users experience few problems. The most reported issues are mild headache, stomach pain, or a dry cough. These usually fade after the first week.

A small number of people notice mood changes—feeling anxious, depressed, or having trouble sleeping. If you spot any sudden emotional shift, call your doctor right away. Serious allergic reactions like rash, swelling, or difficulty breathing are rare but require emergency care.

Things to Watch Out For

Singulair isn’t a rescue inhaler; never use it when you’re having an asthma attack. Keep your quick‑relief inhaler handy for those moments.

If you’re pregnant or planning to become pregnant, discuss the benefits and risks with your healthcare provider. The drug is generally considered safe, but each situation is unique.

People with liver disease need dose adjustments because montelukast is processed by the liver. Your doctor will run a quick blood test if that’s a concern.

When to Talk to a Doctor

Reach out if you notice persistent coughing, wheezing, or shortness of breath despite daily Singulair. Also call if you develop unexplained fever, severe stomach pain, or any sign of an allergic reaction.

Regular check‑ups help your doctor decide whether to keep Singulair, change the dose, or add another medication. Keeping a symptom diary—what triggers flare‑ups, when you take your pill, and how you feel—makes those appointments more productive.

Bottom Line

Singulair is a steady, once‑daily option for managing asthma and allergy symptoms by blocking leukotrienes. Take it consistently, watch for side effects, and stay in touch with your doctor to get the best control of your breathing.