I have been looking into this a little bit lately, MizBarbie. As you said, it is sold as patch called Prokarin (Procarin), and is marketed by a lady with MS.

I don't know how allergies work in our bodies (I haven't studied that much, except how they affect me on a day-to-day basis), but maybe it is like using a immunosuppressant for a messed up immune system. On the surface that doesn't make sense either . . .

It does seem like Histamine would be exactly what I (personally) wouldn't need, since it is the allergies that are stirring up my neurological symptoms. I'm going to have to do more research on that though, and ask my neuro to clarify the logic of using Histamine for MS the next time I see her.

Cherie