Featured image of post Warning about CYP3A inhibition, Paxlovid, and Corticosteroids

Warning about CYP3A inhibition, Paxlovid, and Corticosteroids

I have been forcing HPA suppression on myself, unbeknownst to me

TLDR

Probably shouldn’t have taken corticosteroids and Paxlovid; it can suppress the HPA axis and may cause secondary adrenal failure or secondary Cushing’s.

A few light bulbs go off

I had a few lightbulb moments recently. One specifically was seeing a cardiologist for a POTS test (which was negative with orthostatic testing). What triggered this is I was diagnosed with metabolic syndrome by my PCP and stage II hypertension despite still exercising, eating healthy, low stress, normal weight, and sleeping as best I can (it’s okay to good most nights with medication). This metabolic syndrome diagnosis came at 14 months in of long COVID.

Cardio said I’m fine, but I need to get my blood pressure under control. Turns out it’s masked; if I take my own blood pressure at the doctor, it’s stage II; if a nurse or doctor pushes the button, it’s stage I hypertension. This is essentially the opposite of white coat syndrome and inherently more dangerous. I know I’ve had masked hypertension for a long time but was told otherwise. This has finally been charted for my doctors to ignore now going forward (yes, I’m bitter, and more on this shortly).

A very long story short, I did labs for cardio. I told her you don’t need to; they’re going to be normal, but in the interest of pacifying both of us, I agreed. Well, they were, except for one thing still in the normal range but on the low side: cortisol. My morning fasting cortisol was just 7.1. The cardiologist said everything is in the normal range, just like ‘you’ said.

Date Value Normal range
Feb 3, 2026 7.1mcg/dL 2.9 - 19.4 mcg/dL
Dec 27, 2024 17.4mcg/dL 2.9 - 19.4 mcg/dL

Lab results pre and post covid.

I started researching my charts over the past 15 months. One thing that stuck out was I was taking Paxlovid while on Flovent and then prescribed prednisone for my rebound covid. That right there should have never happened, and here is why: https://pubmed.ncbi.nlm.nih.gov/18459946/

I reached out to my inhaler and Xolair prescriber, Asthma and Allergy, and they said that never should have never happened either; it would have been flagged at the pharmacy, to say the least. The problem is, he was only prescribing my inhalers; Paxlovid and prednisone came from two different urgent care doctors—however, all of these people are in the same health care network and have access to my chart.

I have been taking Symbicort throughout this. I got steroid injections in my neck for pain repeatedly last year. Furthermore, I was scheduled to get steroid injections again at the end of this month (I have since cancelled this).

Endocrinology

Likewise, I reached out to my endocrinologist (whom I haven’t seen in 18 months) and told him my cortisol number and also my suspicions of HPA-axis suppression. Needless to say, I have had an urgent ACTH stimulation test scheduled for several weeks out 🙄

I wanted to put this out there if someone is in a similar boat as me, and hopefully it can help point others in the right direction.

Next Steps

Ultimately, there is more at play here than just this, and I do have more to say beyond this, which will be coming soon. I have opted to reactivate a trip to the Mayo, as I’ve come across this and other things that were clearly missed. At this point, I am my own doctor as a patient and telling doctors what to do.

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