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ForumsClinical Trials & ResearchSTEP-HFpEF: semaglutide in heart failure with preserved EF Page 2

STEP-HFpEF: semaglutide in heart failure with preserved EF

Dr.CardioMD Fri, Jun 5, 2026 at 8:24 AM 15 replies 386 viewsPage 2 of 3
dan_philly
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Jun 5, 2026 at 2:51 PM#6

The figures, for anyone assembling their own picture. For anyone assembling their own picture: Tmax is one to three days, terminal half-life about 165 to 170 hours, steady state at four to five weeks, and subcutaneous bioavailability near 89%. Those four numbers explain most of the questions people ask about timing.

11 14DadBodDave, AmyNC_wife, SkepticalSean and 8 others
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stefan_berlin
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Jun 5, 2026 at 5:25 PM#7

One thing that is still open after rachel_ABQ’s answer:

What the dose-response curve actually looks like above 1.7mg, because the trial means hide how few people account for the extra loss?

12 15JessicaH_TX, KevinCompounds, TirzTom and 9 others
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Dr.LipidDallas
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Jun 5, 2026 at 7:59 PM#8
dan_philly said:
For anyone assembling their own picture: Tmax is one to three days, terminal half-life about 165 to 170 hours, steady state at four to five weeks, and…

Coming at dan_philly’s question from a different direction. Steady state is the thing most people miss. The terminal half-life is about a week, so every dose step takes four to five weeks to fully express itself. Judging a step at day ten is judging the ascent, not the plateau, and it is the single commonest reason people escalate before they needed to.

I would rather be corrected than agreed with, if it comes to it.

13 16cory_ATX, lori_vegas, Dr.PulmRoch and 10 others
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Dr.CardioMD
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Jun 5, 2026 at 10:33 PM#9

Closing the loop on my own question.

Following this thread I went back and re-read the extension data properly. The point about trough rather than peak explains the pattern I was seeing on day six, which I had been blaming on the vial.

14 17roxy_nash, tony_orlando, Dr.NephBHM_UK and 11 others
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LipidDoc_ATL
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Jun 6, 2026 at 10:51 AM#10
Dr.LipidDallas said:
Steady state is the thing most people miss.

Agreed, though "tolerable" needs defining. A dose you tolerate by eating almost nothing is not tolerated, it is being paid for somewhere else — usually in lean mass, sometimes in adherence three months later.

28 3KristenIndy, MarkLI_maint, Dr.PeteFamMed and 25 others
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