Here are some treatment durations stated by the CD
Post# of 72440
Quote:
Although optimal dosing and duration of hydroxychloroquine for treatment of COVID-19 are unknown, some U.S. clinicians have reported anecdotally different hydroxychloroquine dosing such as: 400mg BID on day one, then daily for 5 days; 400 mg BID on day one, then 200mg BID for 4 days; 600 mg BID on day one, then 400mg daily on days 2-5.
https://www.cdc.gov/coronavirus/2019-ncov/hcp...tions.html
There are three dosings reported and each dosing lasts at least five days. Base on these information, I speculate that Dr. Smith's treatment is similar with at least five days duration for all his patients.