There is no clear information from the provided sources on whether it is possible to stack Advil coupons. However, the sources do provide some helpful information about Advil that may be relevant to your coupon-stacking question.

Advil is a brand name for ibuprofen, which is a nonsteroidal anti-inflammatory drug (NSAID) used to relieve pain, reduce fever, and decrease inflammation [1]. It is important to note that taking Advil with other NSAIDs, such as Motrin, can increase the risk of side effects and should be avoided [2].

If you are looking to save money on Advil, you may be interested in the Krazy Coupon Lady article [3] which highlights a deal on Advil Dual Action Back Pain Caplets on Amazon. However, it is unclear whether stacking coupons is an option for this deal.

In conclusion, while the provided sources do not directly address whether Advil coupons can be stacked, they do provide helpful information about Advil and ways to save money on the medication.

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/ADVIL
[2] https://www.goodrx.com/classes/nsaids/is-it-safe-to-take-tylenol-acetaminophen-with-advil-or-motrin-ibuprofen
[3] https://thekrazycouponlady.com/2023/05/29/advil-dual-action-back-pain-caplets-288-count-as-low-as-13-on-amazon