Does heroin cause memory loss or brain damage?

My mom used to do heroin and she just seems so ' off '. I'll bring up things from my childhood and she says they never happened or that I remember them wrong. She has a hard time focusing on things. She has the brain of a child in a way. She can barely read or anything. I think some of the reasons she... show more My mom used to do heroin and she just seems so ' off '. I'll bring up things from my childhood and she says they never happened or that I remember them wrong. She has a hard time focusing on things. She has the brain of a child in a way. She can barely read or anything. I think some of the reasons she has issues is because she spent like 10 years doing heroin. But I don't know. What are the side effects of it?
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