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Eyesight changes on a GLP-1

Wegovy’s and Ozempic’s leaflets say urgently contact your doctor if you notice a sudden loss of vision or rapidly worsening eyesight, which may be NAION, a very rare side effect. Wegovy’s leaflet and Zepbound’s label say fast improvements in blood sugar can temporarily worsen diabetic eye disease.

Wegovy’s and Ozempic’s leafletsDiabetic eye complications: commonNAION: very rare

If you have diabetic eye disease

What each says about diabetic eye disease, quoted as written. Mounjaro’s lists it among things to tell your doctor before you start.

MedicineWhat it says
Mounjaroyou have a problem with your eyes (diabetic retinopathy or macular oedema).Mounjaro KwikPen patient leaflet
ZepboundTemporary worsening of diabetic retinopathy has been reported with rapid improvement in glucose control.Zepbound prescribing information
WegovyFast improvements in blood sugar control may lead to a temporary worsening of diabetic eye disease. If you have diabetic eye disease and experience eye problems while taking this medicine, talk to your doctor.Wegovy FlexTouch patient leaflet
OzempicTell your doctor if you have diabetic eye disease or if you experience eye problems during treatment with this medicine.Ozempic patient leaflet

Sudden changes to your eyesight

  • Sudden loss of vision

    Wegovy’s and Ozempic’s leaflets say urgently contact your doctor about sudden vision loss or rapidly worsening eyesight.

  • NAION, very rare

    The same leaflets list NAION, an eye condition that may cause loss of vision without any pain, as up to 1 in 10,000.

  • An eye examination

    If it may be NAION, they say your doctor will refer you for an eye examination, and you may have to stop treatment.

  • Driving

    The NHS says if you have vision problems after using it, don’t drive, ride a bike or use machinery until they’ve gone.

Questions

Can Ozempic affect your eyes?

Ozempic’s leaflet lists complications of diabetic eye disease as common, up to 1 in 10 people, and NAION as very rare, up to 1 in 10,000.

Does Mounjaro cause NAION?

Mounjaro’s leaflet and Zepbound’s label don’t list it. Mounjaro’s asks you to tell your doctor before you start if you have diabetic retinopathy or macular oedema.

What does the NHS say?

The NHS semaglutide page lists sudden loss of vision, usually in one eye at a time, among serious side effects, and says call 111 if you think you’re having one.

Jabwise Pro

Bring your dose history to the appointment.

Jabwise turns your doses, dose changes and weight into a PDF for your GP or doctor, over a week, a month or longer. It states only what you logged.

Jabwise Share Progress with For My GP selected, a one-month range, a five-page report preview and a Share PDF button

Sources

General information, not medical advice. Follow your prescriber’s guidance.

Getting real advice

We’re not doctors. This page sums up what the NHS and the official medicine information say, and can’t tell you what’s right for your body: your prescriber’s instructions and the leaflet in your box come first. More in our terms.

  • Quoted from official sources, each one linked
  • Sources checked 12 October 2026
  • No dosing advice; your prescriber comes first