Advil is a brand of ibuprofen, a nonsteroidal anti-inflammatory drug (NSAID) that is used to relieve pain, fever, and inflammation. According to Drug Patent Watch [1], the patent for Advil expired in 1984, which means that generic versions of ibuprofen are also available.

Regarding Advil coupons, the website of Advil [2] offers various coupons for their products, including Advil tablets, Advil Liqui-Gels, and Advil PM. However, the website does not provide information about the expiration dates of these coupons. It is recommended to check the terms and conditions of the coupon or contact the company's customer service for more information.

It is important to note that all medications, including Advil, have an expiration date. According to GoodRx [3], using expired medications can be dangerous as the effectiveness and safety of the medication may be compromised. The expiration date of Advil can be found on the packaging of the product. It is recommended to discard any expired medication and not to use it.

In conclusion, while the expiration date of Advil coupons is not provided on the company's website, it is important to note that all medications, including Advil, have an expiration date that should be followed to ensure safety and effectiveness.

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/ADVIL
[2] https://www.advil.com/advil-safety/medicine-cabinet-checkup/
[3] https://www.goodrx.com/healthcare-access/medication-education/is-it-dangerous-to-use-expired-medications