To the investigators' knowledge, the development of neuropsychiatric side effects with the use of these second generation direct acting antivirals in absence of interferon therapy, as well as the impact of the expected high sustained virological response to therapy on the psychiatric condition of patients with chronic hepatitis C (in absence of cirrhosis) have not been studied. Therefore, the purpose of this work is to evaluate the neuropsychiatric adverse effects of direct acting antivirals,especially Sofosbuvir and Daclatasvir combination therapy (with or without ribavirin) in patients with chronic hepatitis C, genotype four (the predominant genotype in Egypt).