Hi Aline, sorry to hear you are feeling unwell

Zicron is a brand name for gliclizide, and the patient information leaflet (PIL) does cite nausea as a common side effect, unfortunately:
https://beta.nhs.uk/medicines/gliclazide/
I haven't been on this myself, but I know we have a lot of members who have so hopefully they will be able to share their experiences and the side effects wear off shortly
🙂 Are you measuring your blood sugar levels when you feel particularly bad? It's important when you are on a mdeication of this type that you test your blood sugar levels, particularly before you drive, to make sure you are not dropping too low. Always make sure you have easy access to some fast-acting sugar, like a jelly baby or two, so you can treat anything below 4.0 mmol/l
🙂