- chronic lung disease with chronic hypoxia - sleep apnea requiring bipap / continuous positive airway pressure - retinal disease - porphyria - myastenia gravis - immunodeficiency disorders - hearing disorders - scheduled for general anesthesia - treatment with antibiotics or antiretroviral for any reason - pulse <50 - known ventricular arrhythmias - heart failure: systolic or diastolic - kown qt prolongation - taking medicines that increase the risk of qt prolongation in combination with chloroquine.

- chronic lung disease with chronic hypoxia - sleep apnea requiring bipap / continuous positive airway pressure - retinal disease - porphyria - myastenia gravis - immunodeficiency disorders - hearing disorders - scheduled for general anesthesia - treatment with antibiotics or antiretroviral for any reason - pulse <50 - known ventricular arrhythmias - heart failure: systolic or diastolic - kown qt prolongation - taking medicines that increase the risk of qt prolongation in combination with chloroquine.