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Grapefruit juice acts as a potentiator when it comes to xanax. In other words, when the two are mixed, the xanax will hit you harder and much quicker than it would as prescribed by your doctor. So if you were prescribed xanax as a remedy for anxiety or panic attacks, it would probably just knock you out instead, especially since xanax already has a big "drowsy" side effect to it.

Hope that helped answer your question.

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12y ago

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