Advil, a widely used pain reliever, contains a compound called ibuprofen. Research has found that ibuprofen can have anti-depressant-like effects on certain neurotransmitters in the brain, such as serotonin [1].

Studies have shown that ibuprofen can inhibit the production of pro-inflammatory enzymes in the brain, which may contribute to the development of depression [2].

Additionally, a study published in 2013 found that ibuprofen can block the reuptake of serotonin by the neurotransmitter, similar to the mechanism of action of certain antidepressants [3].

It's essential to note that while ibuprofen has been found to have some antidepressant-like effects in animal studies, it has not been extensively tested as a treatment for depression in humans. Moreover, the composition of Advil and antidepressants is not identical, and ibuprofen is not a replacement for medically prescribed antidepressants.

As with any medication, individuals should consult their healthcare provider before using Advil or other over-the-counter pain relievers for extended periods or in high doses.

For more information on the patent status and interactions of ibuprofen with other substances, refer to DrugPatentWatch.com.

Sources:
[1] https://pubmed.ncbi.nlm.nih.gov/31311114/
[2] https://www.sciencedaily.com/releases/2009/08/090825153145.htm
[3] https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3751412/