Based on the information provided, it does not appear that you can combine several Advil coupons in a single transaction at CVS Pharmacy, which is one of the retailers where Advil is sold. According to CVS's coupon policy [${2}]: "Only one manufacturer or CVS Pharmacy® coupon may be used per item purchased, unless otherwise noted on the coupon." Therefore, it is unlikely that multiple Advil coupons could be used for a single transaction, as the policy does not indicate an exception for this specific product.

It is worth noting that the other two sources provided do not contain information relevant to the question of combining Advil coupons in a single transaction. The first source [${1}] is a patent watch website that provides information about drug patents, including for Advil, but does not contain any information about coupons or promotions. The third source [${3}] is a frequently asked questions page for Kings Island, a theme park, and does not contain any information about Advil or coupons.

In summary, based on the information provided, it does not appear that you can combine several Advil coupons in a single transaction at CVS Pharmacy. However, it may be worth checking with other retailers or contacting Advil's manufacturer directly for more information about their coupon policies.

Sources:

* [1] <https://www.drugpatentwatch.com/p/tradename/ADVIL>
* [2] <https://www.cvs.com/extracare-cvs/couponpolicy>
* [3] <https://www.visitkingsisland.com/frequently-asked-questions>