Started taking bupropion hcl, have black tar stools, dirahia, and blood now when i go too bathroom, what could it be?

Side effects: What you describe are known side effects of the drug. Talk to your doctor on exactly how they want to handle this but you should become normal after a few days after you stop taking it.

Not likely: While there are not enough data to know for sure, it appears that some SSRIs may be more likely to cause bleeding than others, but bupropion is not one of them. Bupropion can sometimes cause severe constipation and inflamed hemorrhoids what can lead to bleeding.