Nick Mark MD Profile picture
Mar 30, 2022 16 tweets 12 min read Read on X
The largest trial of #ivermectin in early #COVID is now published @NEJM & the results are *NEGATIVE*

#TOGETHER randomized n=1358 outpatients with COVID in 🇧🇷 to IVM vs placebo. No difference in hospitalizations, mechanical ventilation, or death.

nejm.org/doi/full/10.10…

A 🧵
1/
I’ve written about the #TOGETHER trial before (see my fluvoxamine 🧵below)

Briefly #TOGETHER is a large double blind multi-arm platform RCT. Pretty much the 1st 🥇 gold standard for high quality medical research.

2/
TOGETHER enrolled high risk people with COVID from 12 outpatient clinics in Brazil.

Patients could be enrolled up to 7 days after symptom onset (more on this later).

They were randomized to either placebo or to ivermectin 0.4mg/kg daily for 3 days. (Also more on dose later)
3/
The primary endpoint was a composite of hospitalization or >6hr ED visit. (Not an awesome primary endpoint IMO 🤷).

Secondary endpoints included: time until hospitalization, hospital LOS, need for mechanical ventilation, duration of MV, and death. (All very reasonable 👍)

4/
It enrolled n=1358 people.

The patients were slightly younger (median age 49) with the expected mix of comorbid conditions seen in COVID (DM2, HTN, asthma).

The groups appear well balanced (see my prior thread about the likely fraudulent vitamin C paper for more on this.)
5/
The study was stone cold NEGATIVE.

There was NO statistically significant difference in the primary endpoint or *ANY* of the secondary endpoints.

Beyond the overall negative findings, there was no prespecified subgroup that benefited from ivermectin.

Super duper negative.
6/
Now let’s address some of the likely #CultOfIvermectin criticisms:

“BuT tHe IvErMeCtIn dOsE wAs ToOoO LoW!”

#TOGETHER used a dose twice as high as the FDA approved dose of ivermectin: 0.2mg/kg

#TOGETHER also used a higher dose than most of the low quality “positive” trials.
7/
“BuT tReAtMeNt sTaRtEd ToOoOo LaTe!”

Roughly half the patients (44%) got treatment within 3 days. That’s early. Among the patients who were treated earlier they did… worse!

8/
Also if we look at the patients who *completed* the 3 day course of ivermectin (per-protocol analysis) they actually did *worse* than the intention to treat group.

If ivermectin really worked, you might expect the people who completed a course of it to better. They didn’t.
9/
“BuT mOrTaLiTy wAs LoWeR!”

A common misconception about stats.
Let’s look at the 0.88 mortality effect.
The confidence intervals mean there is a 95% chance that mortality is between 51% less OR 55% more with IVM.
Would *YOU* take a drug that might increase mortality by 55%?
10/
“tHe tRiAl WaS dEsIgNeD tO fAiL bY eViL pHaRmA!”

This was one arm of a *multi-arm study*. Another arm of #TOGETHER found that a repurposed cheap generic med (fluvoxamine) *improved* outcomes in COVID.

How (& why) would an evil cabal sabotage just one arm of a multi arm RCT?
11/
Related dumb criticism:
“ThE vAcCiNeS wOuLd LoSe tHiEr EUA iF iVeRmEcTiN wAs PrOvEn!”

This is nonsense. The EUA for *vaccines* to prevent severe disease has nothing to do with the absence of therapies. Otherwise Dex, Bari, Toci, etc would have already “voided the EUAs”
12/
“ThIs iS jUsT oNe StUdY!”

This is the largest RCT to date.

👉Every single large RCT has found no survival benefit to ivermectin in COVID. Every one. For example:
#EPIC bit.ly/370lgSi
#IVERCORCOVID bit.ly/3DrkMRx
#ITECH bit.ly/3wMBbyF
13/
On the other hand the *only* trials that have found *any* benefit to ivermectin are:
- fraudulent (Surgisphere, Elegazzar, etc)
- flawed observational studies that are likely biased
- tiny studies looking at non patient centered outcomes like viral load

14/
Clinical 🥡 points:
#TOGETHER is the largest RCT of ivermectin to date. It found that early high dose ivermectin did NOT prevent hospitalization, mechanical ventilation, or mortality in high risk outpatients with COVID.
All prior (non-fraudulent RCTs) have found the same.

15/
You can read more about this here: onepagericu.com/blog/debunking…

You can also watch a grand rounds I did at @NJHealth debunking ivermectin:


16/

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More from @nickmmark

Oct 13
#HurricaneHelene damaged the factory responsible for manufacturing over 60% of all IV fluids used in the US, leading to a major national shortage.

As clinicians what can we do to about the #IVFluidShortage and how can we prevent this crisis from happening again?

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There are many things we can do as clinicians to improve ICU care & reduce IVF use.

1️⃣Don't order Maintenance IV Fluid!
Almost no patient actually needs continuous IV fluids.
Most either need resuscitation (e.g. boluses) or can take fluid other ways (PO, feeding tube, TPN).
2/
Frequently if someone is NPO overnight for a procedure, MIVF are ordered.
This is wrong for two reasons.
We are all NPO while asleep & don't need salt water infusions!
We should be letting people drink clears up to TWO HOURS before surgery, per ASA.

3/ pubs.asahq.org/anesthesiology…Image
Read 16 tweets
Oct 1
New favorite physiology paper: Central Venous Pressure in Space.

So much space & cardio physiology to unpack here including:
- effects of posture, 3g shuttle launch, & microgravity on CVP
- change in the relationship between filling pressure (CVP) & LV size
- Guyton curves!
1/

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To measure CVP in space they needed two things:
📼 an instrument/recorder that could accurately measure pressure despite g-force, vibration, & changes in pressure. They built & tested one!
🧑‍🚀👩‍🚀👨‍🚀 an astronaut willing to fly into space with a central line! 3 volunteered!
2/
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The night before launch they placed a 4Fr central line in the median cubital vein & advanced under fluoro.

🚀The astronauts wore the data recorder under their flight suit during launch.

🌍The collected data from launch up to 48 hrs in orbit.
3/
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Read 16 tweets
Jul 16
The media silence on this is deafening.

Did he have a head CT? What did it show?
Did he have stitches? Tetanus shot?

The NYT ran nonstop stories about Biden’s health after the debate but can’t be bothered to report on the health of someone who was literally shot in the head?
To the people in the replies who say it’s impossible because of “HIPPA”
1. I assume you mean HIPAA
2. A normal presidential candidate would allow his doctors to release the info. This is exactly what happened when Reagan survived an assassination attempt.
washingtonpost.com/obituaries/202…
My advice to journalists is to lookup tangential gunshot wounds (TGSW).

Ask questions like:
- what imaging has he had?
- what cognitive assessments?
- has he seen a neurosurgeon or neurologist?
- he’s previously had symptoms like slurred speech, abnormal gait - are these worse?
Read 4 tweets
Jun 30
You've probably heard "don't give lactated ringers because it raises lactate"

This statement is ~98% false, but there's one crucial practice-changing fact that you need to know.

A 🧵 all about lactic acid and lactated ringers!
1/
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First off, we should ackowledge the obvious: Lactated ringers does in fact contain lactate... 28 mEq/L in fact

BUT there's one little detail to remember:
Lactate ≠ Lactic acid

When we measure "lactate" we care about the ACID (H+) which lowers pH & causes organ dysfunction
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But the correlation between pH & lactate is really bad!

Look at this analysis of lactate vs pH in 171 ICU patients.

There is a *weak* correlation in people with arterial lactate > 5, but even w/ lactate =10, pH ranged from 7.5 to 7.05. Quite a spread!

3/ ncbi.nlm.nih.gov/pmc/articles/P…
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Read 10 tweets
Jun 13
If you intubate you need to read the #PREOXI trial!
-n=1301 people requiring intubation in ED/ ICU were randomized to preoxygenation with oxygen mask vs non-invasive ventilation (NIV)
-NIV HALVED the risk of hypoxemia: 9 vs 18%
-NIV reduced mortality: 0.2% vs 1.1%

#CCR24
🧵
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Hypoxemia (SpO2 <85%) occurs in 10-20% of ED & ICU intubations.

1-2% of intubations performed in ED/ICU result in cardiac arrest!

This is an exceptionally dangerous procedure and preoxygenation is essential to keep patients safe.

But what’s the *BEST* way to preoxygenate?
2/
Most people use a non-rebreather oxygen mask, but because of its loose fit it often delivers much less than 100% FiO2.

NIV (“BiPAP”) delivers a higher FiO2 because of its tight fit. It also delivers PEEP & achieves a higher mean airway pressure which is theoretically helpful!
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Read 15 tweets
Jun 12
Results from #PROTECTION presented #CCR24 & published @NEJM.
- DB RCT of amino acid infusion vs placebo in n=3511 people undergoing cardiac surgery w/ bypass.
- Reduced incidence of AKI (26.9% vs 31.7% NNT=20) & need for RRT (1.4% vs 1.9% NNT=200)

Potential game changer!

🧵
1/
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I work in a busy CVICU & I often see AKI following cardiac surgery.

Despite risk stratification & hemodynamic optimization, AKI remains one of the most common complications after cardiac surgery with bypass.

Even a modest reduction in AKI/CRRT would be great for my patients.
2/ From Nature reviews nephrology  https://www.nature.com/articles/nrneph.2017.119
During cardiac surgery w/ bypass, renal blood flow (RBF) is reduced dramatically. This causes injury, especially in susceptible individuals.

But what if we could use physiology to protect the kidneys?

Renal blood vessels dilate after a high protein meal increasing RBF & GFR!
3/ https://www.jtcvs.org/article/S0022-5223(18)33243-4/fulltext
Read 11 tweets

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