Merck said it has no intention of starting clinical trials for IV
This is a pity.
The problem with published scientific research is that negative results are nowhere near published at the same rate as positive results.
I contend that negative results are just as important, sometimes more so - especially for contentious matters.
Currently lots of publications for "Drug X show promise against Disease Y" But rarely "Drug X ineffectlve against disease Y"
Most reviews about Ivermectin conclude by saying more research into Ivermectin efficacy against Covid19 is required.
By not doing that research Merck is basically leaving the question unanswered and what do you think that does to sales of Ivermectin?.