This is the single most common reason people stop treatment, and most of it is manageable. The mechanism explains the fix: the medication slows how quickly your stomach empties, so a normal-sized meal now sits there far longer than it used to.
Slowed gastric emptying is part of how the medication works, not a malfunction. Food stays in the stomach longer, which is why you feel full sooner and for longer, and also why a large or fatty meal now feels considerably worse than it did.
That means the fix is mostly behavioural rather than medical. People who keep eating the same portions out of habit have a much harder time than people who adjust to what their stomach can now comfortably hold.
Four or five small meals instead of three normal ones. This is the single most effective change and it works within days.
Protein first, fat later
Fatty and fried food is the worst offender because it slows emptying further. Protein first also protects lean mass.
Stop at comfortable
Fullness now arrives earlier than habit says it should. Eating past it is what turns discomfort into nausea.
Keep fluids up
Sipping through the day rather than large amounts at once. Dehydration makes everything else feel worse.
When it is not routine
When nausea stops being expected
Vomiting you cannot keep fluids down through is not routine. Neither is severe abdominal pain, particularly pain that radiates to the back, or nausea that arrives suddenly at a dose you have been stable on for weeks.
How long it lasts, what helps, and when it is not normal.
Typically a few days to two weeks after starting or increasing a dose, then easing. Nausea that persists past that usually means the dose needs holding rather than tolerating.
Fatty, fried and very large meals are the worst, because they slow gastric emptying further. Rich food late in the evening is a common trigger.
Sometimes, and it is a reasonable thing to ask about. It is a conversation with your clinician rather than something to self-medicate, because it can mask a symptom that matters.
Occasional vomiting after overeating happens. Repeated vomiting, or being unable to keep fluids down, is not routine and needs to be seen the same day.
For most people yes, within one to two weeks per dose step. If it does not, holding or stepping back is the standard adjustment.
