140 women in a trial received either paclitaxel with vistusertib or paclitaxel with a placebo. No difference was found in cancer growth, survival, or treatment effectiveness between the groups. Severe side effects were more common in the vistusertib group, including increased infection risk and fatigue. Adding vistusertib to paclitaxel did not improve ovarian cancer treatment. Low PTEN levels were linked to longer cancer growth intervals in the vistusertib group, suggesting further study is needed.