Advil Liqui-Gels differ from other Advil products in their form and how they are absorbed by the body. While other Advil products come in the form of tablets or caplets, Advil Liqui-Gels are a liquid-filled capsule. According to the Advil website [2], the liquid form allows for faster absorption of the pain reliever, which can provide relief in as little as 20 minutes.

The active ingredient in Advil is ibuprofen, a nonsteroidal anti-inflammatory drug (NSAID) that works by reducing inflammation and pain in the body. Advil Liqui-Gels contain the same amount of ibuprofen as other Advil products [1].

A study published in the Journal of Pain Research [3] found that Advil Liqui-Gels were more effective than regular Advil tablets in treating menstrual cramps. The study also found that the Liqui-Gels were absorbed more quickly and had a faster onset of action than the tablets.

In summary, Advil Liqui-Gels differ from other Advil products in their form and faster absorption rate. They contain the same amount of ibuprofen as other Advil products and have been shown to be more effective in treating menstrual cramps.

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/ADVIL
[2] https://www.advil.com/what-difference-between-advil-pm-caplets-and-advil-pm-liqui-gels/
[3] https://pubmed.ncbi.nlm.nih.gov/27806251/