Monas OFT 4 mg Flash Tablet, manufactured by ACME Laboratories Ltd., is an oral medication used for the management of asthma, exercise-induced bronchoconstriction (EIB), and allergic rhinitis. It contains montelukast sodium, a selective leukotriene receptor antagonist that inhibits the action of leukotrienes—chemicals involved in inflammation and bronchoconstriction. By blocking these substances, montelukast helps to reduce airway inflammation, prevent bronchoconstriction, and alleviate allergy symptoms such as sneezing and nasal congestion. This formulation is designed for pediatric patients aged 2 to 5 years and is typically taken once daily in the evening. It is important to note that Monas OFT 4 mg is not intended for the relief of acute asthma attacks and should be used as part of a long-term asthma management plan. Common side effects may include headache, abdominal pain, and gastrointestinal discomfort. As with any medication, it's essential to follow your healthcare provider's instructions and consult them before starting or discontinuing use.