Adderall is so commonly prescribed but honestly for some people the better choice may be dextroamphetamine. I know it was for me.
The levo-amphetamine in adderall causes what is known as peripheral side effects. Higher heart rate. And so on. It doesn’t actually help the brain. Apparently it helps the dextro part last longer.
It sounds like the OP was talking about stroke. The way it was written ("started") it's a little unclear whether the OP was in fear of experiencing a stroke because of other side effects (elevated BP or something), or actually experienced a stroke, which is an extremely rare side effect.
I've never heard this particular phrase before and I can only guess it's meaning vaguely from the context.
What does it mean?