Russia developed a vaccine candidate that should be tested, but they skip the test part before the announcement for political reasons. Something like https://en.wikipedia.org/wiki/Mission_Accomplished_speech

EDIT: You mean Hydroxychloroquine? I never heard of Hydroxychloride to treat covid-19. Hydroxychloroquine has a few known issues https://en.wikipedia.org/wiki/Hydroxychloroquine#Adverse_eff... . Anyway, the main problem is that the studies that support it's effect against covid-19 are very weak.