TAT-N15, a p55PIK inhibitor, demonstrates significant anti-inflammatory and neuroprotective effects. It effectively suppresses the activation of IL-6, IL-8, Akt, and NF-κB pathways, along with the phosphorylation of STAT3 and the protein expression of NF-κB. TAT-N15 is applicable for research on acute conjunctivitis, allergic rhinitis, chronic obstructive pulmonary disease (COPD), and stroke through its inhibition of Akt, STAT3, and NF-κB pathways.