Could be on Etizolam, too, but haven't heard much on that. Also, every record shows cimetidine (Tagamet), not ranitidine (Zantac), is the true CYP3A4 potentiator.ДЄnecdotal experiences here indicate grapefruit juice is most effective on Xanax and Valium. 'ДЄnything that interacts with P450 and CYP3A4 is where you will find the grapefruit and cimitidine boost. Temazepam shows no significant interaction with CYP3A4 inhibitors (e.g. Temazepam is one of the very few benzos that are not affected by grapefruit juice AT ALL regardless of color or if came fresh from grandma's garden.ДЇrom the Wiki: 'Unlike many benzodiazepines, pharmacokinetic interactions involving the P450 system have not been observed with temazepam. Never hurts to kill two birds with one stone.Д¬lick to expand.This is totally false (and I've tried it, too). Perricone-I did not follow the reference tot he journal article), it also is a healthy and vitamin-rich part of the grapefruit and will be good for you. So, if you're looking to drink the juice, read labels carefully or, more likely, just eat the fruit and make sure to eat the rind-in addition to having more of the inhibitor (I read in a book by MD Dr. Only one product contained only ruby red grapefruit juice from concentrate and a preservative. It's a very tricky way to market, because the product is all juice but it is not all plain gtapefruit juice. I have not read through ever single response to this post but back when I studied psychipharmacology I recall finding that it was either only or mosstly RUBY RED grapefruit juice that has this effect.ДЄlso, it is more applicable to the actual fruit, especially the rind if you look at the composition of almost any grapefruit juice available on the American market (I recently read the ingredients of EVERY SINGLE grapefruit juice available at Safeway and another major grocery store), even the ones that say 100% ruby grapefruit juice are either from concentrate (which I don't know how would affect the enzyme inhibition-I assume not too much) OR, more frequently, WAS 100% juice but mostly other juices: carrot juice, apple juice, grape juice, beet juice, and then also grapefruit juice.

Ruby red grapefruit juice