John Damianos, M.D. Profile picture
@MayoClinicGIHep Gastroenterology & Hepatology Fellow. Yale Internal Medicine, Dartmouth Med. 🦠Microbiome, brain-gut axis, diet, IBS, IBD, motility, #MedEd🇬🇷

Oct 24, 2021, 23 tweets

Rationale for #TDM

All TDM should be performed in the context of the clinical disease activity and severity -@IBDMD

Philosophy of #TDM

Throwback to #medschool! #Pharmacology in #IBD has additional considerations

Drug assays ⬇️⬇️⬇️

4⃣phases of #TDM in #IBD

Phase 1⃣

Genetic polymorphisms for thiopurines and anti-TNFs

Combo therapy with anti-TNF > monotherapy, *but* it's not always necessary

Phase 2⃣ of #TDM

Who has ⬆️ clearance of anti-TNFs?

We can stratify likelihood of loss of response!

⬆️ level is associated with ⬆️ response

Proactive #TDM > reactive TDM? Still up for debate...?

Phase 3⃣ of #TDM

Is the patient losing response to therapy?

Reactive #TDM targets

The most informative level is 0.

>10 means drug is present, but there may not be enough.

For anti-TNF only.
NOT helpful if no detectable drug.
Rememvber to follow up

#TDM can detect subclinical loss of response in the asymptomatic patient

Phase 4⃣ of #TDM

We *can* restart medications after drug holiday! Use #TDM to guide.

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