2026-09-07 · 5 min
Weight-treatment effects: when to contact the doctor
Nausea, constipation and low appetite are common; warning signs need urgent assessment or 112. What to do without stopping in a rush.
Many medical weight-loss treatments cause digestive effects, especially at the start or when the dose rises: nausea, fullness, constipation, diarrhoea or a change in appetite. That does not by itself mean the plan “does not work”, but it should not be ignored.
Contact the doctor (follow-up or, if acute, an urgent consultation) if vomiting prevents hydration, if there is severe abdominal pain, jaundice, dizziness with dehydration, new palpitations, markedly depressed mood, or you can no longer eat. Do not raise the dose on your own to “go faster”.
Call 112 or go to hospital emergency if there is severe chest pain, serious breathing difficulty, extreme dehydration, confusion, fainting or suspected severe allergy. A video call does not replace 112 in these cases.
Stopping treatment overnight without advice also has risks (yo-yo weight, diabetes decompensation, return of symptoms). Pausing, reducing or changing the plan is a clinical decision.
Note what you feel, since when, and the current dose. That record makes follow-up useful. The aim of follow-up is to adjust treatment to tolerance, not to guarantee a rate of weight loss.
Book weight-management follow-up
Frequently asked questions
Do mild nausea in the first days need urgent care?
Often not, if you can drink and the pain is tolerable. If it worsens, if you vomit repeatedly or cannot hydrate, seek medical assessment. If life is at risk, call 112.
Can I lower the dose myself?
Do not change the regimen without medical advice. Book follow-up and describe the effects; the adjustment is made in the consultation.
Do effects mean the treatment is not indicated?
Not necessarily. They may be temporary, dose-related, or a reason to change the plan. Only clinical assessment distinguishes.