Chewable Advil, also known as ibuprofen, is a nonsteroidal anti-inflammatory drug (NSAID) that is commonly used to relieve pain and reduce fever. According to the manufacturer's website, chewable Advil starts working within 15 to 30 minutes after ingestion [2]. However, it may take longer for the medication to take effect in some individuals. The drug patent watch website indicates that the onset of action of ibuprofen is approximately 30 minutes [1].

It is important to note that the effectiveness of chewable Advil may vary depending on the individual's weight, age, and medical condition. For children, the dosage of chewable Advil should be based on their weight and age, and it is recommended to consult with a healthcare provider before administering any medication [2].

Furthermore, it is essential to follow the recommended dosage and not exceed the maximum daily dose to avoid potential side effects. According to Dr. Sears, ibuprofen should not be given to children under six months of age and should be used with caution in children with a history of stomach ulcers, asthma, or kidney problems [3].

In conclusion, chewable Advil typically starts working within 15 to 30 minutes after ingestion, but the onset of action may vary depending on the individual's weight, age, and medical condition. It is crucial to follow the recommended dosage and consult with a healthcare provider before administering any medication to children [1][2][3].

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/ADVIL
[2] https://www.advil.com/faqs-en/childrens-advil
[3] https://www.askdrsears.com/topics/health-concerns/childhood-illnesses/medicine-cabinet/ibuprofen/