JenMemphis said:

Nine weeks flat after five months of steady loss, same dose, same routine, and I cannot tell whether to wait or change something.

Plateau breaking story with a stall: I stalled at 198 lbs for 8 weeks. Tried everything — calorie cycling, increased exercise, more water. Nothing worked.

What finally broke the plateau: adding HIIT cardio 2x/week. Lost 10 lbs in the next 3 weeks. Plateaus are temporary — they always break if you stay consistent.

Dr.BariatricHTX said:

Plateau breaking story with a stall: I stalled at 198 lbs for 8 weeks.

Agreeing with Dr.BariatricHTX, and the qualification matters more than the agreement. Most reported plateaus are not plateaus. Weight is a noisy signal — daily variation of one to two kilograms from glycogen, sodium and gut contents — so a fortnight of flat readings is well inside the noise band. Before concluding anything, look at a rolling weekly average over at least four weeks and at a tape measure, because recomposition shows up in circumference before it shows up in weight. Then track intake honestly for a week: appetite suppression fades unevenly, and intake creeping back up is the single commonest cause.

If somebody has the primary source to hand I would rather cite it than paraphrase it.

JenMemphis said:

Nine weeks flat after five months of steady loss, same dose, same routine, and I cannot tell whether to wait or change something.

Adding a me-too, because a thread of one person's experience is not much use.

Adding the clinical framing, because it changes how the question reads. Take it one variable at a time. Almost every unanswerable question in these threads is unanswerable because three things changed in the same fortnight, and no amount of subsequent argument can untangle them after the fact.