In COVID Clinic, Two groups of COVID patients are matched in terms of age, sex, underlying disease, and disease severity. After randomization, one group receive fluvoxamine, 50 mg tablets twice daily for 10 days along with the main therapy, and the control group receives a placebo. These patients are selected under the direct supervision of a neurologist for appropriate conditions and the absence of contraindications. After 4 weeks from the onset of symptoms, any of the patients who are still in the study will be contacted by phone and will be evaluated for neuropsychological symptoms common in long COVID syndrome including dizziness, fatigue, headache, impaired consciousness, ataxia, seizures Taste, olfactory dysfunction, visual disturbance, myalgia, depression, memory impairment, sleep disturbance, anxiety, autonomic dysfunction and difficulty concentrating. Then the effect of receiving fluvoxamine in the group receiving this drug on the prevention of long-term COVID symptoms is evaluated.