It could be an allergy to brown rice or some other ingredient. It might even be something they used when they made it. Try another brand or try the soy or almond. But be aware that it's possible to be allergy to one or both of those as well. When my son was born, he was born with an allergy to both cow milk (SEVERE lactose intolerance) and soy milk. And this was before the new formulas for kids that were allergic to both
Here are a couple of links where they talk about either rice milk allergies or brown rice allergies. I hope this helps. - Justin
can't really help you with the sickness, but if you want some good vegan recipes check out http://justbento.com/ they aren't all vegan but a good portion of them are. Hope you feel better soon
Here are a couple of links where they talk about either rice milk allergies or brown rice allergies. I hope this helps. - Justin
http://www.mothering.com/discussions/archive/index.php/t-131974.html
http://www.vegsoc.org.au/forum_messages.asp?Thread_ID=3646&Topic_ID=6