Much buzz about the mixup between hydroxychloroquine and hydroxyquinolone.
Seems some studies either used HCQ at the HQ dosage, or they used HQ instead.

E.g., Even in the quote they can't make up their minds whether the FDA is talking about either of these drugs they're not really talking about.
hydroxyquinoline or
hydroquinolone

"Hydroxyquinoline is FDA-approved for the treatment of malaria and some autoimmune conditions but has not been adequately tested or approved for the treatment of COVID-19 and may have very serious adverse effects including QT interval prolongation and ventricular tachycardia. The FDA did issue an Emergency Use Authorization for hydroquinolone in COVID-19 patients who are hospitalized or in clinical trials"

https://www.neiglobal.com/Members/MonthInPsychopharmPost/tabid/509/topic/20370/Default.aspx