See the DrugPatentWatch profile for advil

Based on the information available, it is generally not possible to stack Advil coupons for greater discounts. This is because most manufacturers and retailers have specific policies in place that prohibit the stacking of coupons or the use of multiple coupons for a single purchase [1].

According to the Advil website, they do offer coupons and discounts, but there is no mention of being able to stack coupons for additional savings [2]. Additionally, drugstores and pharmacies such as CVS, Walgreens, and Rite Aid also have their own policies regarding coupon usage, and it is unlikely that they would allow customers to stack coupons for the same item [3][4][5].

It is important to note that some online platforms may claim to offer coupon-stacking services for a fee, but these services should be approached with caution. Using such services may violate the terms and conditions of the manufacturer or retailer, and could result in the coupons being invalidated or the customer being banned from using coupons in the future.

In summary, based on the available information, stacking Advil coupons for greater discounts is generally not allowed by manufacturers or retailers. It is always recommended to check the terms and conditions of the coupons and the retailer's coupon policy before making a purchase.

Sources:
[1] DrugPatentWatch.com, "Coupon Stacking Policies", <https://www.drugpatentwatch.com/coupon-stacking-policies/>
[2] Advil.com, "Coupons and Offers", <https://www.advil.com/coupons-offers>
[3] CVS.com, "Coupon Policy", <https://www.cvs.com/help/coupon-policy>
[4] Walgreens.com, "Coupon Policy", <https://www.walgreens.com/topic/promotion/coupon_policy.jsp>
[5] RiteAid.com, "Coupon Policy", <https://www.riteaid.com/help/coupon-policy>