Advil is a brand name for ibuprofen, which is a nonsteroidal anti-inflammatory drug (NSAID) used to relieve pain and reduce fever. The maximum quantity of Advil allowed depends on various factors such as age, weight, medical history, and current health condition.

According to Drugs.com [3], the recommended dosage for adults is 200-400mg every 4-6 hours, not to exceed 1200mg in 24 hours. However, this dosage may vary based on the severity of pain or fever. It is advised to consult a healthcare provider before taking any medication, especially if you have a history of stomach ulcers, liver or kidney disease, or high blood pressure.

GoodRx [2] advises that taking more than the recommended dose of Advil can lead to adverse effects such as stomach bleeding, kidney damage, and even heart attack or stroke. The maximum daily dose of Advil for children and adolescents is based on their weight, and it is important to follow the dosage instructions on the label or as prescribed by a healthcare provider.

Drug Patent Watch [1] provides information on the patent status and expiration of Advil, but does not offer any guidance on the maximum quantity allowed.

In summary, the maximum quantity of Advil allowed varies based on individual factors such as age, weight, and medical history. It is important to follow the recommended dosage instructions on the label or as prescribed by a healthcare provider, and not to exceed the maximum daily dose to avoid adverse effects.

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/ADVIL
[2] https://www.goodrx.com/ibuprofen/how-much-is-too-much-advil-ibuprofen
[3] https://www.drugs.com/advil.html