Dr.AddMedPHL said:

The mechanism that matters here is not stomach emptying, it is central.

Thank you — that is the clearest version of this I have read, and I have read a lot of them. Printing the relevant bit and taking it with me.

Adding the clinical framing, because it changes how the question reads.

Gallbladder ultrasound monitoring on gallbladder risk: given the known gallstone risk with rapid weight loss, my doctor orders gallbladder ultrasound every 6 months:

Baseline: normal, no stones or sludge
Month 6: small amount of biliary sludge, no stones
Month 12: sludge resolved, gallbladder normal

Ursodeoxycholic acid (Ursodiol) 300mg BID was prescribed prophylactically from the start. This reduces gallstone formation during rapid weight loss by ~60% per the available data. Ask your doctor about prophylactic ursodiol if you're losing weight rapidly.

Dr.RaviCardio said:

The dose-response is real but shallow at the top.

I will push back on the "any working dose is fine" framing. The maintenance evidence sits overwhelmingly at the top studied dose, and the extension data shows regain tracking dose reduction rather than tracking stopping. Holding low is reasonable; pretending it is evidentially equivalent is not.

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

PharmacoVig_BOS said:

The gallbladder signal is real and it is mostly the weight loss, not the drug.

Gallbladder warning for gallbladder risk: rapid weight loss increases gallstone risk regardless of method. GLP-1 patients have a ~2-3% incidence of gallbladder events in clinical trials.

Symptoms to watch for: pain in upper right abdomen after fatty meals, nausea after eating, pain radiating to right shoulder. I had my gallbladder out at month 9 — it was full of stones. My surgeon said it's very common in significant weight loss patients.

Moderator note: leaving this open. It is being argued well and the disagreement is the useful part.