Effect on 
There was no statistically significant difference in baseline cAMP, TNF‐α, and IL‐6 serum levels between the pentoxifylline and placebo groups. (Changes in cAMP and inflammatory markers
Baseline and 8‐week comparisons between groups.Within group comparison.Furthermore, cAMP serum level in the pentoxifylline group was significantly higher after 8 weeks compared with their baseline data (Notably, the pentoxifylline group's PANSS‐negative subscale scores and cAMP serum levels revealed a statistically significant negative correlation (