It stimulates the pancreas to release insulin to lower your blood sugar levels and even increases insulins response
Beyond this, cases of fraudulent compounded GLP-1 RAs have been reported by the FDA in the US, including products with false or misleading information on their labels
Randomized Clin Trial Diabetes Care 41(2):258266 Ahrn B, Masmiquel L, Kumar H, Sargin M, Karsbl JD, Jacobsen SH, Chow F (2017) Efficacy and safety of once-weekly semaglutide versus once-daily sitagliptin as an add-on to metformin, thiazolidinediones, or both, in patients with type 2 diabetes (SUSTAIN 2): a 56-week, double-blind, phase 3a, randomised trial
Occasional nausea returning during stress or after dietary indiscretion represents normal medication response rather than new concern