Sister Stretch's claim about "Pfizermectin" deconstructed here. Now who are we going to believe, Pfizer itself or Stretch? 
Drug Pfizer is studying for COVID-19 not ‘suspiciously similar’ to ivermectin
Ivermectin, an anti-parasite drug sometimes used to treat horses, has not been proven effective as a treatment for COVID-19. Nevertheless, the Zero Hedge blog claims that Pfizer is testing a drug to prevent COVID-19 that is essentially the same as ivermectin. The blog suggests, without evidence, that ivermectin has prevented COVID-19 deaths.
A headline on Zero Hedge, which we’ve fact-checked before, alluded to ivermectin by stating: "Pfizer Launches Final Study For COVID Drug That's Suspiciously Similar To 'Horse Paste.’" The post was flagged as part of Facebook’s efforts to combat false news and misinformation on its News Feed. (Read more about our partnership with Facebook.)
The post’s reference to "horse paste" seems to be a reference to criticism that ivermectin is only for deworming horses. It is used in animals, but it has also been approved for use in humans, just not as a COVID-19 cure. The blog post is based on an article from the Reuters news agency about a Pfizer drug known as PF-07321332. The article said Pfizer has begun a study of the pill in up to 2,660 healthy adults who live in the same household as someone with a confirmed symptomatic COVID-19 infection. Pfizer described the drug as a protease inhibitor, which is "designed to block the activity of the main protease enzyme that the coronavirus needs to replicate." That would stop symptoms from worsening, a spokesperson said. Zero Hedge seized on the protease inhibitor fact, claiming "that's exactly what ivermectin" does. Pfizer’s protease inhibitor is not similar to that of an animal medicine and does not use the same mechanism, a Pfizer spokesperson told us.
Benjamin Neuman, chief virologist at Texas A&M University's Global Health Research Complex, said ivermectin’s main job is to block ion channels that parasites use to store up positively and negatively charged atoms. SARS-CoV-2 does not have any ion channels like the ones that ivermectin blocks, so there is not an obvious way for ivermectin to work in COVID-19, he said.
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Drug Pfizer is studying for COVID-19 not ‘suspiciously similar’ to ivermectin
Ivermectin, an anti-parasite drug sometimes used to treat horses, has not been proven effective as a treatment for COVID-19. Nevertheless, the Zero Hedge blog claims that Pfizer is testing a drug to prevent COVID-19 that is essentially the same as ivermectin. The blog suggests, without evidence, that ivermectin has prevented COVID-19 deaths.
A headline on Zero Hedge, which we’ve fact-checked before, alluded to ivermectin by stating: "Pfizer Launches Final Study For COVID Drug That's Suspiciously Similar To 'Horse Paste.’" The post was flagged as part of Facebook’s efforts to combat false news and misinformation on its News Feed. (Read more about our partnership with Facebook.)
The post’s reference to "horse paste" seems to be a reference to criticism that ivermectin is only for deworming horses. It is used in animals, but it has also been approved for use in humans, just not as a COVID-19 cure. The blog post is based on an article from the Reuters news agency about a Pfizer drug known as PF-07321332. The article said Pfizer has begun a study of the pill in up to 2,660 healthy adults who live in the same household as someone with a confirmed symptomatic COVID-19 infection. Pfizer described the drug as a protease inhibitor, which is "designed to block the activity of the main protease enzyme that the coronavirus needs to replicate." That would stop symptoms from worsening, a spokesperson said. Zero Hedge seized on the protease inhibitor fact, claiming "that's exactly what ivermectin" does. Pfizer’s protease inhibitor is not similar to that of an animal medicine and does not use the same mechanism, a Pfizer spokesperson told us.
Benjamin Neuman, chief virologist at Texas A&M University's Global Health Research Complex, said ivermectin’s main job is to block ion channels that parasites use to store up positively and negatively charged atoms. SARS-CoV-2 does not have any ion channels like the ones that ivermectin blocks, so there is not an obvious way for ivermectin to work in COVID-19, he said.
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