Advil is a brand name for ibuprofen, which is a nonsteroidal anti-inflammatory drug (NSAID) used to relieve pain, fever, and inflammation. There are no restrictions on Advil coupons, but the availability and terms of these coupons may vary depending on the source.

Drug Patent Watch [1] is a website that provides information on drug patents, including Advil. It does not provide any information on Advil coupons.

Advil's official website [2] offers various coupons and offers for their products. These coupons can be used to save money on Advil products such as Advil tablets, Advil Liqui-Gels, and Advil PM. The website provides clear instructions on how to use the coupons, and the terms and conditions associated with each coupon.

Motrin's official website [3] also offers coupons for their products, including Motrin IB and Motrin PM. These coupons can be used to save money on Motrin products, but they cannot be used for Advil products.

In conclusion, there are no restrictions on Advil coupons, but the availability and terms of these coupons may vary depending on the source. Advil's official website offers various coupons and offers for their products, while Motrin's official website offers coupons for their products but not for Advil products.

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/ADVIL
[2] https://www.advil.com/offers/
[3] https://www.motrin.com/coupons