* 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.

- 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.