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I think the study says that grapefruit juice INCREASES the absorption.
This study caused quite a stir when it came out. At the time I was on Tykerb and I asked my oncologist about the study. Although it is true that grapefruit juice (and maybe other things) affect the absorption rate, each person's metabolism is different. So tinkering with absorption rates could be dangerous as you wouldn't really know how much you were getting.
That said, it would be nice if this area could be more fully investigated because these drugs are definitely expensive - and if you could really control/adjust the dose by adding specific foods, that would be great. I'm not a "big pharma" conspiracy theory person - I LOVE Genentech (and also GSK the maker of lapatinib) and hope to be one of their labrats for a lot more years - but I am skeptical that these studies would be a funding priority for THEM. But I'd sure like to see more of this type of research!
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Chris in Scotts Valley
June 2002 extensive hi grade DCIS (pre-cancer-stage 0, clean sentinal node) Mastectomy/implant - no chemo, rads. "cured?"
9/2004 Diag: Stage IV extensive liver mets (!) ER/PR- Her2+++
10/04-3/05 Weekly Taxol/Carboplatin/Herceptin , complete response!
04/05 - 4/07 Herception every 3 wks, Continue NED
04/07 - recurrence to liver - 2 spots, starting tykerb/avastin trial
06/07 8/07 10/07 Scans show stable, continue on Tykerb/Avastin
01/08 Progression in liver
02/08 Begin (TDM1) trial
08/08 NED! It's Working! Continue on TDM1
02/09 Continue NED
02/10 Continue NED. 5/10 9/10 Scans NED 10/10 Scans NED
12/10 Scans not clear....4/11 Scans suggest progression 6/11 progression confirmed in liver
07/11 - 11/11 Herceptin/Xeloda -not working:(
12/11 Begin MM302 Phase I trial - bust:(
03/12 3rd times the charm? AKT trial
5/12 Scan shows reduction! 7/12 More reduction!!!!
8/12 Whoops...progression...trying for Perjeta/Herceptin (plus some more nasty chemo!)
9/12 Start Perjeta/Herceptin, chemo on hold due to infection/wound in leg, added on cycle 2 &3
11/12 Poops! progression in liver, Stop Perjeta/Taxo/Herc
11/12 Navelbine/Herce[ptin - try for a 3 cycles, no go.
2/13 Gemzar/Carbo/Herceptin - no go.
3/13 TACE procedure
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