Advil is a brand name for ibuprofen, which is a nonsteroidal anti-inflammatory drug (NSAID) used to relieve pain, reduce fever, and decrease inflammation. According to the NHS [3], ibuprofen should be taken with or after food, and a full glass of water should be consumed with each dose. The recommended dose of ibuprofen is 200mg to 400mg every four to six hours, up to a maximum of 1,200mg in 24 hours. However, the maximum daily dose may be lower for some people, such as those with kidney problems or those over the age of 65.

The Advil website [2] recommends taking one or two tablets every four to six hours, with a maximum of six tablets in 24 hours. It also advises taking the tablets with a full glass of water and not to crush or chew them. It is important to follow the instructions on the packaging or as directed by a healthcare professional.

The Drug Patent Watch website [1] provides information on the patent expiration date of Advil, but does not offer any guidance on how much water to drink with the medication.

In summary, when taking Advil (ibuprofen), it is recommended to take it with food and a full glass of water. The recommended dose is 200mg to 400mg every four to six hours, up to a maximum of 1,200mg in 24 hours. It is important to follow the instructions on the packaging or as directed by a healthcare professional.

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/ADVIL
[2] https://www.advil.com/faqs-en/advil-pain/
[3] https://www.nhs.uk/medicines/ibuprofen-for-adults/how-and-when-to-take-ibuprofen/