Hydroxychloroquine Alternatives for Chronic Disease: Response to a Growing Shortage Amid the Global COVID-19 Pandemic.

With the emergence of a novel severe acute respiratory syndrome coronavirus, investigators worldwide are scrambling to identify appropriate treatment modalities, develop accurate testing, and produce a vaccine. To date, effective treatment remains elusive. Chloroquine phosphate and hydroxychloroquine sulfate (HCQ), well-known antimalarial drugs effective in the treatment of systemic lupus erythematosus, rheumatoid arthritis, porphyria cutanea tarda, and chronic Q fever, are currently under investigation.