Published on: Sunday, June 27, 2021 By: Kan Yaw Chong Text Size: Fast flowing rivers – breeding ground of vector Blackfly. IVERMECTIN has been labelled one of the Triumvirate of human drugs – that is, ranked top three among all time, all-important essential drugs in human history, along with penicillin and aspirin. In fact, it has been dosed to humans all over the world 3.7 billion times, especially in poverty-stricken African countries as an anti-parasitic to treat river blindness, with little or no side effects since WHO first approved it for human use in 1987. Yet, it is almost unheard of by most people – myself included.