Sertaline is an anti-anxiety medication, similar to Fluoxetine, Lexapro, Xanax etc… I take Fluoxetine to address my anxiety which indirectly helps with my speech fluency since I’m not as anxious in social settings etc… Ask your doctor for Propanolol as well, which is only used as needed before a stressful speaking event like interview, performance or presentation. It calms the adrenaline affects significantly.