Definition of "hydroxychloroquine"

More on Malaria: Sterling-Winthrop Research Institute reports a new, effective antimalarial. Called hydroxychloroquine, its activity (with experimental animals) is equal to that of chloroquine, but it is much safer in large doses. Hydroxychloroquine can be taken orally or by injection and is retained in the blood for a longer period of time than chloroquine.

1951, Chemical Week, volume 69, page 28

Seventy-five patients suffering from P. falciparum malaria were treated at Gressier, Haiti, with a single oral dose of hydroxychloroquine, which has the chemical structure 7-chloro-4 (4'-(N-ethyl-N-B-hydroxyethylamino)-1-methylbutylamino)-quinoline diphosphate.

1952, E. H. Loughlin, “The Treatment of Plasmodium falciparum Malaria with a Single Dose Antimalarial”, in Antibiotics and Chemotherapy, volume 2, number 4, page 171

It is the purpose of our report to describe the effects of hydroxychloroquine sulfate in patients with active rheumatoid arthritis, and to compare these effects with those in a similar group of patients who received chloroquine phosphate for 18 months.

1957 April, Arthur L. Scherbel, “Comparison of effects of two anti-malarial agents, hydroxychloroquine sulfate and chloroquine phosphate, in patients with rheumatoid arthritis”, in Cleveland Clinic Quarterly, volume 24, page 98

Mr. [Donald] Trump’s recommendation of hydroxychloroquine, for the second day in a row at a White House briefing, was a striking example of his brazen willingness to distort and outright defy expert opinion and scientific evidence when it does not suit his agenda.

2020 April 5, “Ignoring Expert Opinion, Trump Again Promotes Use of Hydroxychloroquine”, in The New York Times‎