Inclusion Criteria:  18 years old and above positive COVID-19 test (antigen or PCR) symptomatic from COVID-19 symptoms less than or equal to 7 days  Exclusion Criteria:  already enrolled in another COVID-19 drug study chronically taking a H1-receptor antagonist or H2-receptor antagonist have taken H1-receptor antagonist or H2-receptor antagonist less than 72 hours from expressed interest in the study. history of an adverse reaction to H1 or H2-receptor antagonists severe liver disease severe renal disease taking steroids taking hydroxychloroquine and/or azithromycin already participating in a COVID-19 vaccine trial already received a COVID-19 vaccine symptoms greater than 7 days have had COVID-19 more than once