The Oregon Grape has a pretty blue berry on the bush when it is fully ripe. The plant is used for medicinal purposes. But can the berries (they are not grapes) be eaten?

Here is some information from "Random Musings"
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"This is Oregon’s state plant. Oregon liked it because the glossy leaves could be used for decoration and it was plenty. It resembles a holly leaf and it very shiny and often the ones left in sunlight the leaves will turn orange or bright red. It is a lovely plant. The “grapes” are edible and have been eaten quite a bit over the years by both pioneers as well as Indians. It has also been used for medicinal purposes. (I put grapes in quotes because they really are berries and not grapes but do have an oval shape more like a grape.) However, it it a sour little thing and should never be eaten if pregnant. Rumor has it – it may contain oxidants that actually help with cancer patients. (This is still being studied.)"