yes they (heroin and meth) are two different things but like I stated the ingredients for both are used in meth\heroin speed balls. which makes them one drug...

think of it like mixing the ingredients for a peanutbutter cookie and a chocolate chip cookie.. the result is the two cookies become one new cookie.

with speedballing two different drugs are mixed to create one thing, its not like you can pull a part the meth ingredients and the heroin ingredients once they are refined and mixed together.

its ok if you dont believe there is such a thing... I didnt either when my sibling was into drugs...

but if you type in a search bar..... what is a meth heroin speedball you will get all kinds of factual information about it.