i don't feel sleepy immediately but, within an hour i start to get heavy eyelids.
vascularity should start to increase a little, hours after injection, some veins will look a little more blue on the forearms. then, over the course of a week, veins that were never there before will appear throughout the body and skin should start to look thinner on abs, with abs more visible and delts and other muscles should look fuller.
if it's hcg or anti-diuretic then none of those things will happen, CTS may occur but there won't be a positive change in physique.