Let me start by saying this is a medical hypothesis, NOT proven fact.
However, it makes biochemical sense and is postulated by three well published University professors. I should also say ARBs have been proposed as theoretically being a treatment for Covid by at least one other person (https://www.ncbi.nlm.nih.gov/pubmed/32129518 ), so clearly researchers are doing science: coming up with hypothesis which need to be tested. That does not help us in the moment however and I have seen no research out of China that mentions any use of ARBs for Covid-19 (and I have been looking).
It does feel worthwhile to post this, as it may help in some cases.
As a naturopathic physician, we routinely do not recommend suppressing a moderate fever (below 102 or 103’F) in a well hydrated, non compromised person. Fever is a normal healthy response to fight infection. Of course, there is time for suppression when fever is to high, too prolonged, etc and using hydrotherapy, homeopathy and herbs would be our preferred course of action, not ibuprofen.
But this following hypothesis is a red flag for suppressing Covid fever with ibuprofen, especially in patients concurrently taking
1. ARBs (drugs end in -sartan. Azilsartan (Edarbi); candesartan (Atacand), valsartan (Diovan); losartan (Cozaar); olmesartan (Benicar). ARB stands for AT1R blockers and they represent a major class of antihypertensive medications.
2. ACE-inhibitors (ACE inhibitors end with -pril: benazepril (Lotensin, Lotensin Hct); captopril (Capoten); enalapril (Vasotec); fosinopril (Monopril); lisinopril (Prinivil, Zestril). 3. Thiazolidinediones (Avandia (rosliglitazone) and Actos (pioglitazone))This article suggests ibuprofen as well as ARBs and ACE inhibitors may increase morbidity from Covid-19 due to their ability to upregulate (increase expression/concentration) of ACE2. https://www.thelancet.com/pdfs/journals/lanres/PIIS2213-2600(20)30116-8.pdf
These data suggest that ACE2 expression is increased in diabetes and treatment with ACE inhibitors and ARBs increases ACE2 expression. ACE2 can also be increased by thiazolidinediones and ibuprofen. Consequently, the increased expression of ACE2 would facilitate infection with COVID-19. We therefore hypothesise that diabetes and hypertension treatment with ACE2-stimulating drugs increases the risk of developing severe and fatal COVID-19.
They go on to say, "Based on a PubMed search on Feb 28, 2020, we did not find any evidence to suggest that antihypertensive calcium channel blockers increased ACE2 expression or activity, therefore these could be a suitable alternative treatment in these patients”.
Just passing on information, you must be the final judge.
Claire