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40—SATURDAY Vanguard, OCTOBER 16, 2021<br />

Tak<strong>in</strong>g Ivermect<strong>in</strong> won’t<br />

s<strong>top</strong> COVID-19 <strong>in</strong>fection<br />

— Experts<br />

By Sola Ogundipe<br />

<strong>in</strong>ce news broke that Ivermect<strong>in</strong> has a<br />

Sperceived therapeutic effect aga<strong>in</strong>st the<br />

COVID-19 virus, there has been mad rush for<br />

the drug all <strong>over</strong> the world.<br />

With countless tablets of the drug be<strong>in</strong>g sold<br />

<strong>over</strong>-the-counter, the risk of misuse, <strong>over</strong>dose,<br />

and purchase of the animal version is<br />

dangerously high.<br />

In Nigeria particularly, the shelf price of<br />

Ivermect<strong>in</strong> tablets has gone up appreciably <strong>in</strong><br />

recent times as desperate stockpil<strong>in</strong>g of large<br />

quantities commenced <strong>in</strong> the wake of the<br />

emergence of the Delta variant among other<br />

concerns.<br />

But health experts have warned that<br />

Ivermect<strong>in</strong> has no effect <strong>in</strong> curtail<strong>in</strong>g COVID-<br />

19 and called for cautionary use.<br />

As the contr<strong>over</strong>sy rages around the drug, an<br />

<strong>in</strong>ternational group of experts has faulted the<br />

series of studies claim<strong>in</strong>g that the drug is a<br />

miracle remedy aga<strong>in</strong>st the disease.<br />

The scientists said the studies claim<strong>in</strong>g that<br />

Ivermect<strong>in</strong> can treat the coronavirus<br />

disease have been found to be not only deeply<br />

flawed, but unreliable even as they call for an<br />

<strong>over</strong>haul of medical research to prevent more<br />

mis<strong>in</strong>formation around unverified cures.<br />

Flawed studies mak<strong>in</strong>g<br />

the rounds<br />

In a letter <strong>in</strong> the Nature Medic<strong>in</strong>e, a scientific<br />

journal, the group of researchers expla<strong>in</strong>ed<br />

how ris<strong>in</strong>g doubts about studies claim<strong>in</strong>g<br />

ivermect<strong>in</strong> could help treat Covid are flawed.<br />

They detail how one such piece had concern<strong>in</strong>g<br />

discrepancies <strong>in</strong> its data, which led to its<br />

eventual withdrawal.<br />

Accord<strong>in</strong>g to the World Health<br />

Organisation, WHO, and the US Food and<br />

Drug Adm<strong>in</strong>istration, FDA, ivermect<strong>in</strong> is not<br />

authorized or approved for use <strong>in</strong> prevent<strong>in</strong>g<br />

or treat<strong>in</strong>g COVID-19 <strong>in</strong> humans. The CDC<br />

notes that Ivermect<strong>in</strong> is approved for human<br />

use to treat <strong>in</strong>fections caused by some parasitic<br />

worms and head lice and sk<strong>in</strong> conditions like<br />

rosacea.<br />

The scientists argue that currently available<br />

data do not show ivermect<strong>in</strong> is effective aga<strong>in</strong>st<br />

COVID-19, although cl<strong>in</strong>ical trials assess<strong>in</strong>g<br />

ivermect<strong>in</strong> tablets for the prevention or<br />

treatment of COVID-19 <strong>in</strong> people are ongo<strong>in</strong>g.<br />

Warn<strong>in</strong>g that tak<strong>in</strong>g large doses of<br />

ivermect<strong>in</strong> is dangerous, the experts say<br />

ivermect<strong>in</strong> should be procured through<br />

legitimate sources such as a pharmacy, and<br />

taken exactly as prescribed.<br />

•Drug not authorised for coronavirus<br />

treatment or prevention<br />

Part of the anxiety is that Ivermect<strong>in</strong> products<br />

are different from those approved for humans<br />

and that the use of animal ivermect<strong>in</strong> for the<br />

prevention or treatment of COVID-19 <strong>in</strong><br />

humans is dangerous.<br />

In another research, they said elements <strong>in</strong> its<br />

methodology were flawed, and the errors were<br />

then compounded by larger reviews, called<br />

meta-analyses, which based their f<strong>in</strong>d<strong>in</strong>gs <strong>in</strong><br />

large part on these flawed studies.<br />

Impossible numbers,<br />

unexpla<strong>in</strong>able mismatches <strong>in</strong> data<br />

The scientists add that this<br />

study is not alone and predict<br />

others claim<strong>in</strong>g ivermect<strong>in</strong><br />

has a cl<strong>in</strong>ical benefit will also<br />

be withdrawn <strong>in</strong> the com<strong>in</strong>g<br />

months due to their<br />

“impossible numbers”, and<br />

“unexpla<strong>in</strong>able<br />

mismatches” <strong>in</strong> the data.<br />

But the damage may have<br />

been done with many<br />

hundreds of thousands of<br />

patients that have taken the<br />

drug, accord<strong>in</strong>g to the<br />

pr<strong>in</strong>cipal signatory of the<br />

letter, Kyle Sheldrick of the<br />

University of New South<br />

Wales <strong>in</strong> Australia.<br />

“This research has created<br />

undue confidence <strong>in</strong> the use<br />

of ivermect<strong>in</strong> as a<br />

prophylactic or treatment for<br />

Covid, has usurped other<br />

research agendas, and<br />

Even the levels<br />

of ivermect<strong>in</strong><br />

for approved<br />

human uses<br />

can <strong>in</strong>teract<br />

with other<br />

medications,<br />

like bloodth<strong>in</strong>ners<br />

probably resulted <strong>in</strong> <strong>in</strong>appropriate treatment<br />

or substandard care of patients,” they wrote.<br />

As a result, the scientists called for an<br />

<strong>over</strong>haul of how cl<strong>in</strong>ical data on Covid is<br />

analysed. They said creators of meta-analyses<br />

should both request and review the <strong>in</strong>dividual<br />

patient data, the raw from <strong>in</strong>dividual<br />

participants <strong>in</strong> a study or trial, of the studies<br />

they use to reach their wider conclusions.<br />

Similarly, the scientists said cl<strong>in</strong>ical trials<br />

on Covid treatment should also make this data<br />

available to ensure this k<strong>in</strong>d of analysis could<br />

happen. Any study that refuses to do so should<br />

be treated with extreme caution or omitted<br />

from analysis entirely, the scientists said.<br />

They acknowledge their call may be<br />

contr<strong>over</strong>sial because it represents a change<br />

to a “long-accepted” scientific practice but<br />

added that the ivermect<strong>in</strong> example justifies it.<br />

“We believe that what has happened <strong>in</strong> the<br />

case of ivermect<strong>in</strong> justifies our proposal: a<br />

poorly scrut<strong>in</strong>ized evidence base supported the<br />

adm<strong>in</strong>istration of millions of doses of a<br />

potentially <strong>in</strong>effective drug globally. Yet when<br />

this evidence was subjected to a very basic<br />

numerical scrut<strong>in</strong>y it collapsed <strong>in</strong> a matter of<br />

weeks,” they wrote.<br />

Ivermect<strong>in</strong> <strong>in</strong>effective<br />

aga<strong>in</strong>st viruses<br />

Meanwhile, Dr. Timothy Geary, one of the<br />

world’s foremost experts of Ivermect<strong>in</strong>, also<br />

warned that Ivermect<strong>in</strong> is <strong>in</strong>effective aga<strong>in</strong>st<br />

COVID-19 or <strong>in</strong> fight<strong>in</strong>g viruses generally.<br />

Geary, the Research Chair <strong>in</strong> Parasite<br />

Biotechnology at McGill<br />

University <strong>in</strong> Montreal, Canada,<br />

says that the 2020 study which<br />

spawned much of the Ivermect<strong>in</strong>craze<br />

is not be<strong>in</strong>g correctly read.<br />

In an <strong>in</strong>terview, he expla<strong>in</strong>ed<br />

that although the study did show<br />

that Ivermect<strong>in</strong> could <strong>in</strong>hibit the<br />

replication of COVID-19 virus<br />

cells, many people are<br />

mis<strong>in</strong>terpret<strong>in</strong>g the study and<br />

believ<strong>in</strong>g that the drug has viruskill<strong>in</strong>g<br />

properties.<br />

Geary expla<strong>in</strong>ed, though, that<br />

the concentration of Ivermect<strong>in</strong><br />

used <strong>in</strong> the study was so high that<br />

it could not be used for treatment<br />

<strong>in</strong> a human, and would likely<br />

cause an <strong>over</strong>dose.<br />

“In that study they showed that<br />

<strong>in</strong> cell cultures, Ivermect<strong>in</strong> could<br />

<strong>in</strong>hibit (Covid) replication, but<br />

the concentrations required for<br />

that effect were <strong>in</strong> a range called<br />

the micromolar range - very high<br />

concentrations relative to what you would f<strong>in</strong>d<br />

<strong>in</strong> the plasma of a treated person or an animal,<br />

which would be 20 to 50 times lower.”<br />

Prescribed versions of Ivermect<strong>in</strong> drug come<br />

<strong>in</strong> pill form, so liquid versions are not advised<br />

and can lead to <strong>over</strong>dose which can cause<br />

serious side effects and even death. They<br />

warned aga<strong>in</strong>st the mis<strong>in</strong>formation be<strong>in</strong>g<br />

spread around that it’s okay to take large doses<br />

of ivermect<strong>in</strong>. It is not okay, they stated.<br />

“Even the levels of ivermect<strong>in</strong> for approved<br />

human uses can <strong>in</strong>teract with other<br />

medications, like blood-th<strong>in</strong>ners. You can also<br />

<strong>over</strong>dose on ivermect<strong>in</strong>, which can cause<br />

nausea, vomit<strong>in</strong>g, diarrhea, hypotension (low<br />

blood pressure), allergic reactions (itch<strong>in</strong>g and<br />

hives), dizz<strong>in</strong>ess, ataxia (problems with<br />

balance), seizures, coma and even death.”<br />

The experts note that currently, the most<br />

effective ways to limit spread of COVID-19<br />

<strong>in</strong>clude gett<strong>in</strong>g a COVID-19 vacc<strong>in</strong>e and<br />

follow<strong>in</strong>g safety precautions and guidel<strong>in</strong>es.<br />

To improve<br />

cancer survival,<br />

scientists<br />

<strong>in</strong>vestigate what<br />

kills patients<br />

cientists don’t really know what kills<br />

Smany cancer patients, but fruit fly<br />

research could provide answers accord<strong>in</strong>g<br />

to University of California, Berkeley,<br />

researchers who are f<strong>in</strong>d<strong>in</strong>g<br />

commonalities between the two that could<br />

lead to ways to prolong the lives of cancer<br />

patients.<br />

Fruit fly research is already po<strong>in</strong>t<strong>in</strong>g to<br />

a new anti-cancer strategy dist<strong>in</strong>ct from<br />

the conventional goal of destroy<strong>in</strong>g the<br />

tumor or cancerous cells. Instead, the<br />

research suggests, launch<strong>in</strong>g an attack<br />

aga<strong>in</strong>st the destructive chemicals the<br />

cancer is throw<strong>in</strong>g off could <strong>in</strong>crease<br />

survival rates and improve patients’<br />

health.<br />

“It’s a really complementary way of<br />

th<strong>in</strong>k<strong>in</strong>g about therapy,” said David<br />

Bilder, UC Berkeley professor of<br />

molecular and cell biology. “You’re try<strong>in</strong>g<br />

to help the host deal with the effects of the<br />

tumor, rather than kill<strong>in</strong>g the tumour<br />

itself.”<br />

Jung Kim, a postdoctoral fellow <strong>in</strong><br />

Bilder’s lab, recently disc<strong>over</strong>ed that<br />

tumours <strong>in</strong> fruit flies release a chemical<br />

that compromises the barrier between the<br />

bloodstream and the bra<strong>in</strong>, lett<strong>in</strong>g the two<br />

environments mix — a recipe for disaster<br />

<strong>in</strong> numerous diseases, <strong>in</strong>clud<strong>in</strong>g <strong>in</strong>fection,<br />

trauma and even obesity. In collaboration<br />

with the labs of UC Berkeley professors<br />

David Raulet and Kaoru Saijo, Kim and<br />

Bilder subsequently demonstrated that<br />

tumors <strong>in</strong> mice that release the same<br />

chemical, a cytok<strong>in</strong>e called <strong>in</strong>terleuk<strong>in</strong>-6<br />

(IL-6), also make the blood-bra<strong>in</strong> barrier<br />

leaky.<br />

More importantly, they were able to<br />

extend the lifespan of both fruit flies and<br />

mice with malignant tumors by block<strong>in</strong>g<br />

the effect of the cytok<strong>in</strong>e on the barrier.<br />

“The IL-6 cytok<strong>in</strong>e is known to cause<br />

<strong>in</strong>flammation. What’s new here is that this<br />

tumor-<strong>in</strong>duced <strong>in</strong>flammation is actually<br />

caus<strong>in</strong>g the blood-bra<strong>in</strong> barrier to open.<br />

If we <strong>in</strong>terfere with that open<strong>in</strong>g process<br />

but leave the tumor alone, then the host<br />

can live significantly longer and healthier<br />

with the same tumor burden,” Bilder said.<br />

IL-6 plays other important roles <strong>in</strong> the<br />

body, so to benefit cancer patients,<br />

scientists would have to f<strong>in</strong>d a drug that<br />

blocks its action at the blood-bra<strong>in</strong> barrier<br />

without alter<strong>in</strong>g its effects elsewhere. But<br />

such a drug could potentially extend the<br />

life span and health span of human cancer<br />

patients, he said.<br />

Accord<strong>in</strong>g to Bilder, scientists still are<br />

uncerta<strong>in</strong> what causes death <strong>in</strong> many<br />

cancer patients. Cancer of the liver, for<br />

example, clearly destroys the function of<br />

an organ essential for life. However, other<br />

organs, like the sk<strong>in</strong> or the ovaries, are<br />

less critical, yet people die from cancer <strong>in</strong><br />

these sites, too, sometimes very quickly.<br />

And though cancers often metastasize to<br />

other organs — multiple organ failure is<br />

one of the ma<strong>in</strong> causes of cancer death<br />

listed by doctors — Bilder questions if<br />

that’s the whole story.<br />

“Many human cancers are metastatic,<br />

but that doesn’t change the basic<br />

question: Why does the cancer kill?” he<br />

said. “If your tumor metastasized to the<br />

lung, are you dy<strong>in</strong>g because of lung failure<br />

or are you dy<strong>in</strong>g from someth<strong>in</strong>g else?”<br />

For that reason, he works with nonmetastatic<br />

tumors implanted <strong>in</strong> fruit flies<br />

and mice and looks for systemic effects,<br />

not merely the effects on the tumorconta<strong>in</strong><strong>in</strong>g<br />

organ itself.<br />

One systemic effect of cancer is<br />

cachexia, the <strong>in</strong>ability to ma<strong>in</strong>ta<strong>in</strong> weight,<br />

which leads to wast<strong>in</strong>g of muscle even<br />

when the patient is receiv<strong>in</strong>g <strong>in</strong>travenous<br />

nutrition. While Bilder disc<strong>over</strong>ed one<br />

possible reason for this — cancers release<br />

a chemical that prevents <strong>in</strong>sul<strong>in</strong> from<br />

stor<strong>in</strong>g energy <strong>in</strong> the body — other<br />

scientists have found additional<br />

substances released by cancers that may<br />

also be responsible for tissue wast<strong>in</strong>g.

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