Formerly The COVID Advisor — evidence-based analysis of Long COVID, immune injury, and post-viral disease
Unexpected Comeback of Hydroxychloroquine 2022
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Editorial Team
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If you have followed the development of early treatment protocols for COVID-19, you will be aware that for well over a year, Ivermectin was the central agent in the FLCCC protocol, for prevention and early treatment. Ivermectin is also part of the hospital level protocols.
Very early on, as discussed in this interview with Professor Varon, Hydroxychloroquine was present in the protocol, but it was dropped mid-2020.
This non-inclusion of Hydroxychloroquine appears to have been in part due to the bad publicity that hydroxychloroquine was suffering from, as it was targeted by the mainstream media, especially in relation to the presidential campaign in the US in 2020.
Comeback of Hydroxychloroquine
This January 19, 2022; it’s therefore a bit of a surprise to see Hydroxychloroquine to re-appear in the FLCCC prevention and early treatment protocol.
The move follows the experience of several frontline doctors who found that Hydroxychloroquine is particularly useful to deal with Omicron, in combination with Ivermectin and other agents, as indicated in the protocol.
Hydroxychloroquine and Clinical Evidence (Updated)
As of February 2022 there have been more than 30 studies of Hydroxychloroquine for early treatment with an overall average improvement of 64% as compared to the control groups.
Hydroxychloroquine (HCQ) is not effective when used very late with high dosages over a long period (RECOVERY/SOLIDARITY), effectiveness improves with earlier usage and improved dosing. Early treatment consistently shows positive effects. Negative evaluations typically ignore treatment time, often focusing on a subset of late stage studies.
Here’s a chart from c19early.comthat shows that hydroxychloroquine performs better than ivermectin when given as early treatment in terms of risk reduction of dying from COVID-19:
The overall improvement for hydroxychloroquine is better than ivermectin (for early treatment); 74 % vs 44 % in terms of death rate. Importantly, hydroxychloroquine needs to be given 'early'.
The difference in terms of effectiveness for hydroxychloroquine is distinctly different when given early vs late treatment (64% vs 20%), as shown in the summary chart below:
The evidence tracking on Hydroxychloroquine versus COVID-19 is available at c19hcq.com (constantly updated).
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Dr. Peter McCullough is an internist, cardiologist, epidemiologist, a full professor of medicine at Texas A&M College of Medicine in Dallas, USA. He also has a master's degree in public health and is known for being one of the top five most-published medical researchers in the United States and is the editor of two medical journals. McCullough Protocol 2022 Update: Azelastine Nasal Spray for Prevention of SARS-CoV-2 Infections: A Phase 2 Randomized Clinical Trial ( JAMA 2025 ) Everyone is familiar with nasal and oral swab testing for COVID-19. It should be obvious the virus is replicating in the nose, and with Omicron, the speed of replication has become much greater than the prior strains of the virus. Thus, there is a wonderful opportunity to reduce viral replication, in fa...
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Dose, blood pressure, carotid plaque, brain health and bleeding risk, graded by evidence tier. By Dr. Frank Yap, MD | Last Updated October 2026 Quick Answer Nattokinase is a clot-dissolving enzyme made by Bacillus subtilis during natto fermentation. Its best-supported human effect is a modest blood pressure drop (about 3 to 5 mmHg systolic) in randomized trials. Plaque regression has been reported only at 6,000 FU/day or higher, in studies that were unblinded or retrospective, while the largest placebo-controlled trial at 2,000 FU/day was null. No trial has measured heart attacks, strokes or deaths. It acts on clotting, so it should not be combined with blood thinners without a clinician, and it must never replace a prescribed anticoagulant. Contents What nattokinase is How it works Human evidence table (CEBM tiers) Blood pressure Plaque and the dose question Cholesterol Brain and stroke research Spike protein claims Natto the food vs. the enzyme Safety, inte...
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