Ibuprofen is not used to treat anxiety. Ibuprofen is a nonsteroidal anti-inflammatory drug (NSAID) that is used to relieve pain and reduce fever. It works by blocking the production of prostaglandins, which are chemicals that cause inflammation and pain in the body [1].

Anxiety is a mental health disorder that is characterized by feelings of worry, fear, and nervousness. It is typically treated with psychotherapy, medication, or a combination of both. The medication used to treat anxiety are benzodiazepines, selective serotonin reuptake inhibitors (SSRIs), and serotonin-norepinephrine reuptake inhibitors (SNRIs) [2].

While there is some evidence to suggest that inflammation may play a role in the development of mental health disorders, including anxiety, there is no evidence to suggest that ibuprofen is an effective treatment for anxiety. In fact, a study published in the Journal of Affective Disorders found that ibuprofen had no significant effect on symptoms of depression or anxiety in patients with osteoarthritis [3].

In conclusion, ibuprofen is not used to treat anxiety. It is a medication used to relieve pain and reduce fever. Anxiety is typically treated with psychotherapy, medication, or a combination of both, and the medication used to treat anxiety are benzodiazepines, SSRIs, and SNRIs. While there is some evidence to suggest that inflammation may play a role in the development of mental health disorders, there is no evidence to suggest that ibuprofen is an effective treatment for anxiety.

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/IBUPROFEN
[2] https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4930904/
[3] https://www.sciencedirect.com/science/article/pii/S0165032716309211