Delirium is a common neuropsychiatric condition prevalent in COVID-19 infected individuals with existing psychiatric illnesses, as described in this systematic review. Other than delirium, rigidity, muscle jerks and poverty of speech was also reported.

To rule out the neuropsychiatric outcomes of COVID-19 in individuals with psychiatric conditions.

The data was gathered during a review of the effect of the ongoing pandemic on people with psychiatric conditions. PsychInfo, CINAHL, EMBASE, Medline and MedRx databases were explored from inception to September 2020. To include all the study types, the risk of bias was evaluated via a publication tool. GRADE tool was used to appraise the evidence.

After carefully omitting the study with patients having reported no psychiatric history, 4 case reports with 13 participants hospitalized with COVID-19 were considered and seemed to have fulfilled the standards for delirium. Alogia (poverty of speech), myoclonus (muscle jerks) and rigidity were also noted down. Mood diseases, schizophrenia, and alcoholism were the most frequently reported psychiatric diagnoses.

COVID-19 infected individuals with psychiatric diseases may suffer from delirium, myoclonus, rigidity and alogia. There is a need for better quality, longitudinal data in the future for a thorough understanding of these conditions.