Vomiting does not remove an injected dose
Wegovy goes in under the skin, so being sick afterwards does not bring the dose back up. Do not inject again because you vomited. A tablet swallowed and vomited before absorption is a different case. A second injection may give you too much medicine.
Write down your dose and injection time, when the vomiting began, how often you have been sick and whether you are keeping any fluids down. If you think you made a dose error, tell a clinician straight away. Do not assume your symptoms are routine.
Small sips while you get advice
If your symptoms are mild and you can drink, take frequent small sips. Avoid forcing down a large glass in one go. A pharmacist can advise on oral rehydration products. Keep an eye on how often you pass urine, any dizziness and whether you can stand and get about normally.
Stop relying on home measures if you are getting drier or weaker. People with diabetes, kidney disease, frailty or a fluid restriction may need to be seen sooner. Illness also changes how safe some other medicines are, so give the clinician your full medicine list.
Symptoms that need urgent assessment
Get urgent help if you keep vomiting and cannot keep fluids down, pass little urine, become unusually drowsy or feel significantly dizzy. Vomiting blood or something like coffee grounds, green vomit in an adult or sudden severe tummy pain needs emergency assessment.
Severe, persistent pain in the upper abdomen, especially pain spreading to your back, raises concern about pancreatitis and other conditions. Stop Wegovy and get immediate medical help if pancreatitis is suspected. Do not wait for your prescribing service to open.
Other causes of vomiting
Vomiting may come from a stomach bug, migraine, pregnancy, another medicine or a condition unrelated to Wegovy. A fever, illness in others at home, a new prescription or a missed period all change the assessment. A recent dose increase matters, but other causes remain possible.
When vomiting is persistent or severe, a clinician may need to examine you, run blood tests or investigate further. The pattern of symptoms guides which tests you need. No website can tell you the cause is simple delayed stomach emptying or diagnose gastroparesis.
Your next dose and other medicines
Contact your prescriber before the next injection if the vomiting has been significant. You may need a slower dose increase or a different plan. An automatic delivery of the next strength is no reason to take a higher dose while you are still unwell.
Vomiting can affect tablets, including the contraceptive pill. Follow each medicine's own instructions and ask a pharmacist whether you need a replacement dose or extra contraception. Different tablets follow different rules. Once you recover, agree how to avoid a repeat and which symptoms mean you should get in touch sooner next time.
Write down the recovery plan you agree and share the plan with any other clinician who prescribes your medicines.
Sources
Your own medicine leaflet and prescriber come first. A source from another country does not mean the same rule applies in the UK.
- Wegovy FlexTouch UK prescribing information medicines.org.uk
- Wegovy FlexTouch patient leaflet medicines.org.uk
- NHS: vomiting and urgent warning signs nhs.uk
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