Some medical issues are more common in various ethnic groups. Heart issues are often more common in blacks, so a slightly altered medication is given to help prevent more issues arising should it come up. It helps the problem more than the normal type would, but it isn't as effective in whites. Basically a targeted medication. I'm no doctor so don't quote me on this, and please correct me if i'm wrong.
You have to read every comment like you're investigating Illuminati.
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Inb4 Illuminati is a joke