SIDE EFFECTS: Tell your doctor immediately if any of these highly unlikely but very serious side effects occur: stomach pain, muscle aches/cramps, irregular heartbeat, yellowing eyes and skin, numbness or tingling of the hands or feet, dull sense of touch, easy bruising or bleeding, swelling, seizures.
Montelukast is usually taken once daily in the evening for prevention of asthma or allergy symptoms. For exercise-induced bronchoconstriction, take a single dose at least 2 hours before you exercise, and do not take another dose for at least 24 hours. Follow your doctor's instructions.
NURSING MOTHERS: Studies in animals have shown that montelukast is excreted in milk; however, it is not known if montelukast is secreted into breast milk in humans
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