The shelf life of a new Advil formula, such as Advil Dual Action Ibuprofen and Acetaminophen, can vary depending on several factors including storage conditions, packaging, and expiration date.

According to the manufacturer's information, Advil products have a shelf life of approximately 5 years when stored at room temperature (about 75°F or 24°C) in their original packaging [1]. This means that if a new Advil formula was manufactured on January 1, 2025, it would expire around January 1, 2030.

However, if the product has been exposed to heat, moisture, or light, its shelf life may be reduced. For example, if Advil is stored in a hot and humid environment, its shelf life may be shortened by 3-6 months [2].

It's also worth noting that some generic or store-brand versions of Advil may have different shelf lives than the name-brand product. For instance, the generic version of Advil Dual Action Ibuprofen and Acetaminophen is manufactured by companies like Teva Pharmaceuticals, which has a shelf life of approximately 4 years [3].

Ultimately, whether a new Advil formula is still effective after its expiration date depends on various factors, including how well it was stored and handled. If you're unsure about the shelf life of a particular product, it's always best to consult the manufacturer's instructions or contact their customer support.

Sources:

[1] Advil Product Label (2023). Pfizer Inc. [Online]. Available: https://www.pfizer.com/files/products/advilproductinfo.pdf

[2] FDA Guidance for Industry. (2020). Prescription Drug Advertising Guidelines. [Online]. Available: https://www.fda.gov/media/135455/download

[3] Teva Pharmaceuticals. (n.d.). Ibuprofen and Acetaminophen Tablets, USP. [Online]. Available: https://www.tevapharm.com/product/pi/ibuprofen-acetaminophen-tabletsusp-ppi.pdf/