Singulair is available as the brand formulation of Montelukast and is a leukotriene receptor antagonist. It has a half-life of 2 to 3 hours in biological terms and has 99% of protein binding. It is a prescription based drug and is available in different forms such as tablet and jelly type.

Medical Uses

Singulair is used in treating conditions like asthma, allergic reactions etc. and it is a leukotriene inhibitor. Leukotriene is a chemical that the body releases when a person inhales pollen. These are the chemicals that cause swelling as well as tightening of the muscles in the liver. This is the reason behind the cause of asthma. When an individual takes this drug, it helps in preventing this process of swelling and developing allergies which in turn reduces the symptoms of asthma.

Dosage and Administration

Singulair is available for use in different dosage forms and strengths. The compressed tablets are film-coated and contain 10 mg of Montelukast. The chewable form comes in 4 mg and 5 mg strengths. The drug is also available as oral granules that can be mixed with water or any other medium for consumption in individual sachets of 4 mg each.

Just like other pills, it is very essential to follow the instructions of the doctor while taking Singulair. This pill is taken in the evening to treat conditions like asthma as well as all as allergic reactions. In case of treating a condition like breathing troubles during an exercise, the pill can be taken 2 hours prior to starting the activity. The next dose should be taken only after 24 hours. The drug can be taken with or without food.

As dosage for any individual depends on the medical response, age as well as the severity of the condition, it is not possible to generalize the dosage strength. Singulair is also available in jelly form. It should be chewed properly before swallowing. The tablet form of this drug should be swallowed as a whole without crushing, breaking or snorting it. It takes few weeks of time to see visible difference in the symptoms.

Important safety information

Before taking Singulair it is important to learn few basic precautions for the safe use of the drug. They are as follows:

  • It is vital to remember that the drug does not have fast onset of action and is not suitable when an asthma attack is already taking place.
  • Singulair is more useful in prevention than in treatment, and other inhaler drugs may be used for instant relief from an asthma episode.
  • If at the any time the patient feels that the drug does not work as well as it used to then the dose may have to be increased after consulting with the doctor.
  • Mental health problems that occur while using this medication like depression, suicidal thoughts, anxiety, mood swings, and other changes in behavior should be reported to the doctor without delay.
  • The drug may take a few weeks for its effects to be felt in treating asthma. Consult with your physician if there are no signs of improvement at all even after a few weeks on the drug therapy.
  • The ingredients of chewable Singulair may cause interactions if you have phenylketonuria, which you must inform the doctor of beforehand.
  • Avoid taking this drug if you are allergic to Montelukast, have a family history of asthma, or allergic to similar asthma medications.
  • The drug may not cause harm to the unborn baby if taken while pregnant but it is recommended to inform the doctor of the pregnancy anyway.
  • Also inform the provider if you are currently breast-feeding, even though this is not considered as being harmful.

Do not increase or decrease the dose of Singulair without consulting the physician. Never stop taking the pills suddenly as it would cause symptoms of withdrawal as well as unwanted ill effects. Before commencing the course of therapy, consult the healthcare provider regarding any allergic reactions to aspirin.

Side effects

Certain side effects are aggravated while taking Singulair. Mood swings, change in behavior, skin rash, weakness, numbness, pain, bruising, ear pain, swelling in face or tongue, stomach pain, diarrhea, fever, flu like symptoms, sore throat, stuffy nose, sinus ache, cough, head ache and loss of control in the bladder are a few among them. When an individual experiences any side effects or any changes in body condition, it is essential to get medical help as soon as possible.

Relative contraindications to Singulair

The active ingredient in the drug may interact with other drugs. It is very important not to take such drugs together with this drug. Discuss with the physician regarding all the drugs that are taken by you. It also includes prescription drugs, over-the-counter, vitamins as well as herbal products.


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