Demand surges for ivermectin despite no evidence that it works on COVID

While sometimes given to humans in small doses for head lice, scabies and other parasites, ivermectin is more commonly used in animals. Physicians are raising alarms about a growing number of people getting the drug from livestock supply centers, where it can come in highly concentrated paste or liquid forms.

Calls to poison control centers about ivermectin exposures have risen dramatically, jumping fivefold over their baseline in July, according to C.D.C. researchers, who cited data from the American Association of Poison Control Centers. Mississippi’s health department said earlier this month that 70 percent of recent calls to the state poison control center had come from people who ingested ivermectin from livestock supply stores.

Dr. Shawn Varney, a toxicologist and medical director for the South Texas Poison Center, said that in 2019 his center received 191 calls about exposure to ivermectin; so far this year the center has received 260 calls and is on pace to reach 390 by the end of the year. The vast majority of the recent calls came from people who took a veterinary product in an attempt to treat or prevent Covid-19.