You asked if I think the paragraph you quoted is from a reputable source or is it BS? I don't understand why you're asking that. I though it was clear. Please clarify.
That statement is worded in standard, cautious, clinical trial-speak. Translated, it means: Until there is convincing evidence from a clinical trial or trials that are:
- Adequately Powered – Means the trial includes enough patients for statistically significant results. The trial design must pass muster with FDA biostatisticians before approval. The last I looked, there were many ivermectin clinical trials, but they include too few patients to allow statistically significant results. A trial of roughly 100 to 300 patients is too small to allow a valid estimation of patient response rates. It's large enough to answer the question, Yes or No, is there enough evidence of an ivermectin response to justify a much larger trial. These are called Phase 2 trials. Larger Phase 3 trials, with roughly 10× more patients, are expensive and difficult to run.
That TOGETHER trial I discussed in a previous post, had 1,500 patients on the ivermectin arm, 677 of whom received ivermectin, and 678 received a placebo. 86 ivermectin patients and 95 placebo patients required extended ER care or hospitalization. Statistically, 86 out of 677 and 95 out of 678 patients are not different numbers. As far as statistical design, that trial can be thought of as border-line between phase 2 and phase 3. However, the trial results clearly say, no don't bother doing a much larger trial.
- Well Designed – Means the trial is a randomized, double blinded, placebo controlled study. There must be at least two study arms, with identical patient populations, where one arm received standard care for Covid-19 plus ivermectin, and the other arm received standard care plus a placebo. The clinical endpoints and exactly what patient population characteristics are selected, must be carefully considered. They can make or break a trial.
- Well Conducted – Means it must be able to stand up to an FDA clinical trial audit, as well as medical peer review for publication purposes.
The NIH guideline says, so far, there is no clinical evidence that ivermectin has anti-virus activity in Covid-19 patients. That doesn't mean there could never be such evidence in the future. Other trials of ivermectin are still in progress. But, unless there is an unanticipated and major breakthrough, there is no reason to expect that conclusion to change.
Remember, the web page you linked is only a brief digest of the full NIH guidelines for treating Covid-19.
Anti-Viral Drugs – Approved or Under Evaluation for Covid-19
Full Treatment Guidelines for Covid-19 Treatment