Can early satiety stem from the wellbutrin (bupropion) im taking? or is it a indication of gastric cancer

Perhaps: You are not likely to have gastric cancer. Early satiety could be due to wellbutrin (bupropion). Wellbutrin (bupropion) is associated with modest weight loss (it was actually studied as a weight loss medication but the effect wasn't strong enough). It can also slow down passage of food through the GI system which could lead to early satiety.

Wellbutrin (bupropion): Wellbutrin (bupropion) antidepressant can have slight effect on appetite, although doubt possibility of cancer if no other symptoms exist to suggest tumor in stomach for your age.