Semaglutide and gallbladder disease risk — cholelithiasis incidence data

Dr.GutHealth said:

Gallbladder warning for gallbladder risk: rapid weight loss increases gallstone risk regardless of method.

This matches mine closely enough to be worth saying so out loud.

NicoleRaleigh said:

Gallbladder ultrasound monitoring on gallbladder risk: given the known gallstone risk with rapid weight loss, my doctor orders gallbladder ultrasound…

Same experience, arrived at from the opposite direction. Nothing to add that would improve it.

NicoleRaleigh said:

Gallbladder ultrasound monitoring on gallbladder risk: given the known gallstone risk with rapid weight loss, my doctor orders gallbladder ultrasound…

Coming at NicoleRaleigh’s question from a different direction. The dose-response is real but shallow at the top. Across STEP 1 and STEP 4 the gap between 1.7mg and 2.4mg is a couple of percentage points of body weight on average, and the average is carrying a wide spread — plenty of people at 1.7mg sit above the 2.4mg mean. If a dose is working and tolerable, "working" is the relevant variable, not "maximal".

Adding the numbers, since they settle part of this. 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.

Worth separating that from semaglutide, which this thread keeps folding into the same question. They behave differently and the advice does not transfer.

Moderator note: good thread. Keeping it here rather than moving it, because the question is general enough to be useful.