Montelukast Tablets (Generic Singulair)

by Europe


Montelukast sodium (mon te LOO kast) is the generic variation of Singulair. It is an orally taken medicine, usually by hard tablet, used to treat and prevent asthma, as well as other breathing conditions. It has been used widely since approved by the U.S. Food and Drug Administration in 1998 for use with breathing conditions. Montelukast is commonly used in many diseases in which inflammations plays a large role, such as allergic rhinitis. Adverse interactions with other drugs, side effects, warnings, and precautions should all be taken into account before using Montelukast. Consult a doctor before use.

What is Montelukast Used For?

Montelukast is typically taken to help with the effects of asthma, including wheezing and shortness of breath. In addition to limiting common effects of asthma, Montelukast can also be used to limit the frequency of asthma attacks themselves. Montelukast is frequently used prior to physical exercise to treat various breathing problems that come up during physical exertion, such as bronchospasm. When used properly, Montelukast can help to limit the frequency of inhaler use.


Montelukast comes in three variations (tablet, chewable, and granule packet) and is typically prescribed in three specific amounts:

  • Montelukast Tablets 4mg
  • Montelukast Tablets 5mg
  • Montelukast Tablets 10mg

Dosage is prescribed for use on a daily schedule. The recommended dose is typically administered two hours before exercise, if used to treat bronchospasm and other exercise related breathing problems. Otherwise, Montelukast is typically administered in the evening, either with or without food.

The particular dose prescribed will differ depending on the patient. Take Montelukast as your doctor has instructed or follow the instructions on the label. Make sure to check with your doctor for the amount of Montelukast needed. The information included on the label is suggested for average dosing, and a doctor’s orders should be given priority if your dosing differs.

The medicine can also be used to deal with the effects of hay fever and allergic rhinitis on the body, such as runny nose, sneezing, itching, etc. The medicine, while effective, does not take immediate effect and should not be taken to treat an asthma attack or other immediate breathing problems. Call your doctor if an immediate problem related to your asthma or breathing problem occurs.

How Does Montelukast Work?

Montelukast loosens up the body’s airways to make breathing easier. Montelukast works by stopping specific natural substances, such as leukotrienes, that can either cause or make worse a person’s allergies and asthma. By reversing inflammation and thus reducing swelling in the airways of the body, Montelukast makes it easier for a person to breath.

Leukotrienes naturally occur in the body and promote the kind of inflammation that causes asthma and other breathing problems. Their bounding to other cells in the body is what causes inflammation.

What is Montelukast Made Of?

Montelukast sodium is an off-white / white powder that is hygroscopic and optically active. It is freely soluble in ethanol, methanol, and water.


Before taking Montelukast, consult your doctor. If Montelukast makes your breathing worse or your airways feel tighter than before, stop taking and immediately seek professional help. Follow your doctor’s instructions when facing an immediate asthma attack or breathing problem. Do not use Montelukast as an immediate solution. Montelukast tablets should not be used as a substitute for medication prescribed by your doctor. If symptoms of Flu or similar effects take hold, quit taking and consult your doctor. Check with your doctor to see if you are allergic to any of the contents of Montelukast and make known to them any previous allergies or pre-existing conditions you may have.

Phenobarbital, rifampin, and cabazepine (Tegretol, Tegretol XR, Equertro, and Carbatrol) may adversely affect the effects of Montelukast by significantly decreasing the blood concentration of Montelukast in the patient. Montelukast is not known, however, to adversely affect the uses of other drugs.

Side Effects of Montelukast

Montelukast does not have frequently observed severe side effects. A doctor should be consulted if any adverse effects are felt in relation to the consumption of Montelukast. Common side effects include skin rash, tremors, stomach pain, upset stomach, diarrhea, tiredness, stuff nose, cough, mood changes, headache, heartburn, nausea, tooth pain, fever, sore throat, and hoarseness.

Less common side effects include bloody nose, general feelings of discomfort or illness, joint pain, shortness of breath or troubled breathing, tightness of the chest, unusual tiredness and weakness, abdominal or stomach pain, flu-like symptoms, general feelings of discomfort or illness, pain or tenderness around the eyes and cheekbones, sweating, and trouble swallowing. A rare side effect of Montelukast is pus in the urine.

Many of these side effects, both common and less common, will go away on their own throughout treatment as part of a natural adjustment period to the medicine. Your doctor may be able to help in the prevention or reduction of many of these side effects. Consult your doctor for questions on the side effects of Montelukast.

There are no known safety risks specific to pregnant women. It is known, however, that Montelukast crosses the placenta barrier and into the fetus via mother’s oral ingestion. Studies have also shown that Montelukast is excreted through breast milk, although the effect on human children is unknown at this time. It is generally thought that the benefits outweigh the potential risks to the fetus, as those risks are still unknown.

Proper Use and Instructions

Montelukast should only be used to for the treatment of patients fifteen years of age or older.

For the medicine to function as intended, Montelukast should be ingested on a schedule, at the same time each day. Even as asthma and other breathing conditions improve, the medicine should remain regulated to a prescribed schedule.

Montelukast tablets should be kept safely at indoor temperatures ranging from 59 F – 86 F (15 C – 30 C).

Where can I buy Montelukast?

Montelukast has not been recommended by the US Federal Drug Administration for over-the-counter (OTC) sue for the treatment of allergic rhinitis (AR). In a prescription setting, however, Montelukast has been used for children’s asthma and asthma in adults since 1998. It has also been used for exercise related bronchoconstriction since 2007.

Montelukast is approved by prescription in over one hundred countries internationally and has over sixty-six million patient years of tested treatment. Over twenty-four million dose units have been prescribed. No countries, however, have given the all clear for over the counter use.

Once prescribed, you can buy Montelukast online at generic / low cost online providers or at common pharmacies, such as Walgreens or CVS. Singulair is the common brand name associated with Montelukast, but there are also generic variations at lower prices.

Montelukast Tablets

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