LSD puking/nausea?

Nearly every time I do it now I end up feeling sick as the night goes on, and the only thing that really helps is smoking a joint.
The stuff I get is real, none of my friend have the same issue as me with it. Any ideas on why that could be?

Once I smoke and the nausea passes I always have a really good trip, just wish I could skip the sick part.. is it normal?
LSD puking/nausea?
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