[Question] How strong is the evidence for hydroxychloroquine?

There has been a lot of dis­cus­sion of hy­drox­y­chloro­quine (see the megath­read on Effec­tive Altru­ism Coron­avirus Dis­cus­sion, note you need to an­swer two ques­tions to gain ac­cess). Doc­tors treat­ing COVID-19 have rated hy­drox­y­chloro­quine the most effec­tive drug based on their ex­pe­rience. But on the other hand, re­sults have been mixed with a re­cent RCT show­ing no effect.

At this stage how strong is the ev­i­dence for hy­drox­y­chloro­quine and if it works, how effec­tive does it ap­pear to be as a treat­ment?

Dis­claimer: Please seek med­i­cal ad­vice be­fore tak­ing any sub­stance, par­tic­u­larly those like hy­drox­y­chloro­quine that have known side effects.