Based on the provided information, there is no explicit mention of limits on using multiple Advil coupons in a month. However, it is important to note that each source has different scopes of information.

The first source, Drug Patent Watch [1], does not provide any information about coupon usage limits. It primarily focuses on patent and drug information.

The second source, CVS Pharmacy's Coupon Policy [2], outlines the pharmacy's general coupon policies, but it does not mention any specific limitations on using Advil coupons.

The third source, GoodRx's article on Advil usage [3], also does not provide any information about coupon usage limits. It mainly discusses the safe usage and potential risks of Advil (ibuprofen).

Therefore, while there is no direct mention of limits on using multiple Advil coupons in a month, it would be best to consult with the specific pharmacy or coupon provider for their specific policies.

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/MULTIPLE
[2] https://www.cvs.com/extracare-cvs/couponpolicy
[3] https://www.goodrx.com/ibuprofen/how-much-is-too-much-advil-ibuprofen