Ivermectin is not just for control of parasites, the anti-viral properties it has is because it's a protease inhibitor. It prevents certain viruses from binding

Ivermectin is not just for control of parasites, the anti-viral properties it has is because it's a protease inhibitor. It prevents certain viruses from binding to cells. How effective it is at inhibiting binding is the question. This pill in the article and Pfizer's prophylactic are most likely more effective since it's not a by product but the intent. Also more profitable because of patents.