You can but if I recall based on a book I read [0], you’d need to take a pill something like three or four times a day as your body naturally clears GLP-1 very quickly. The chemical has been known since the 90s, the Ozempic breakthrough was binding/mixing it with some chemical of Gila monster venom which makes your body take much longer to break down the chemical (days instead of hours).

[0] Magic Pill by Johann Hari