What symptoms would mean someone needs to seek care urgently while on a GLP-1 medication?

Severe or worsening abdominal pain (possibly radiating to the back), signs of a serious allergic reaction, persistent vomiting that prevents keeping fluids down, signs of dehydration, or a new lump/swelling in the neck are the kinds of symptoms that warrant urgent attention rather than waiting to see if they pass. Ordinary mild nausea or occasional digestive upset, while unpleasant, is generally distinguished from these more serious warning signs. References: https://obesitycanada.ca/healthcare-professionals/adult-clinical-practice-guideline/