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Old 05-09-2018, 06:27 PM   #1
SoCalGal
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MYTESI new drug for diarrhea

Don't have first hand info, but wouldn't hesitate to try this for diarrhea, would be willing to bet it's easier to deal with than Imodium! It is already FDA approved but I thought I'd share this trial info for anyone interested...

Preventing Diarrhea in Patients with HER2+ Breast Cancer
Diarrhea Prevention and Prophylaxis With Crofelemer in HER2 Positive Breast Cancer Patients Receiving Trastuzumab, Pertuzumab, and Docetaxel or Paclitaxel With or Without Carboplatin: HALT-D (NCT02910219)

Summary
To take part in this study, you must have HER2-positive breast cancer. You also must be scheduled to receive at least 3 cycles of chemotherapy with regimens known as THP or TCHP. This study is investigating whether an anti-diarrhea medicine can help prevent chemotherapy-induced diarrhea in HER2+ breast cancer patients. The anti-diarrhea medicine being used in this study is Crofelemer (Mytesi®). It is used to prevent diarrhea in HIV/AIDS patients. The THP chemotherapy regimen contains docetaxel (Taxotere®), trastuzumab (Herceptin®), and pertuzumab (Perjeta®). The TCHP regimen contains docetaxel (Taxotere®), carboplatin (Paraplatin®), trastuzumab (Herceptin®), and pertuzumab (Perjeta®).
This is a Phase II trial

What's involved:
You will be randomly assigned to 1 of 2 groups during the first 2 cycles of chemotherapy with THP or TCHP:

Group 1

Crofelemer (Mytesi®), by mouth, daily
Group 2

No intervention
__________________
1996 cancer WTF?! 1.3 cm lumpectomy Er/Pr neg. Her2+ (20nodes NEGATIVE) did CMF + rads. NED.
2002 recurrence. Bilateral mastectomy w/TFL autologous recon. Then ACx2. Skin lymphatic rash. Taxotere w/Herceptin x4. Herceptin/Xeloda. Finally stops spreading.
2003 - Back to surgery, remove skin mets, and will have surgery one week later when pathology can confirm margins.
‘03 latisimus dorsi flap to remove skin mets. CLEAN MARGINS. Continue single agent Herceptin thru 4/04. NED.
‘04 '05 & 06 tiny recurrences - scar line. surgery to cut out. NED each time.
1/2006 Rads again, to scar line. NED.

3/07 Heartbreaking news - mets! lungs.sternum. Try Tykerb/Xeloda. Tykerb/Carbo/Gemzar. Switch Oncs.
12/07 Herceptin.Tykerb. Markers go stable.
2/8/08 gamma knife 13mm stupid brain met.
3/08 Herceptin/tykerb/avastin/zometa.
3/09 brain NED. Lungs STABLE.
4/09 attack sternum (10 daysPHOTONS.5 days ELECTRONS)
9/09 MARKERS normal!
3/10 PET/CT=manubrium intensely metabolically active but stable. NEDhead.
Wash out 5/10 for tdm1 but 6/10 CT STABLE, PET improving. Markers normal. Brain NED. Resume just Herceptin plus ZOMETA
Dec 2010 Brain NED, lungs/sternum stable. markers normal.
MAR 2011 stop Herceptin/allergy! Go back on Tykerb and switch to Xgeva.
May-Aug 2011 Tykerb Herceptin Xgeva.
Sept 2011 Tykerb, Herceptin, Zometa, Avastin.
April 2012 sketchy drug trial in NYC. 6 weeks later I’m NED!
OCT 2012 PET/CT shows a bunch of freakin’ progression. Back to LA and Herceptin.avastin.zometa.
12/20/12 add in PERJETA!
March 2013 – 5 YEARS POST continue HAPZ
APRIL 2013 - 6 yrs stage 4. "FAILED" PETscan on 4/2/13
May 2013: rePetted - improvement in lungs, left adrenal stable, right 6th rib inactive, (must be PERJETA avastin) sternum and L1 fruckin'worsen. Drop zometa. ADD Xgeva. Doc says get rads consultant for L1 and possible biopsy of L1. I say, no thanks, doc. Lets see what xgeva brings to the table first. It's summer.
June-August 2013HAPX Herceptin Avastin Perjeta xgeva.
Sept - now - on chemo hold for calming tummy we hope. Markers stable for 2 months.
Nov 2013 - Herceptin-Perjeta-Avastin-Xgeva (collageneous colitis, which explains tummy probs, added Entocort)
December '13 BRAIN MRI ned in da head.
Jan 2014: CONTINUING on HAPX…
FEB 2014 PetCT clinical “impression”: 1. newbie nodule - SUV 1.5 right apical nodule, mildly hypermetabolic “suggestive” of worsening neoplastic lesion. 2. moderate worsening of the sternum – SUV 5.6 from 3.8
3. increasing sclerosis & decreasing activity of L1 met “suggests” mild healing. (SUV 9.4 v 12.1 in May ‘13)
4. scattered lung nodules, up to 5mm in size = stable, no increased activity
5. other small scattered sclerotic lesions, one in right iliac and one in thoracic vertebral body similar in appearance to L1 without PET activity and not clearly pathologic
APRIL 2014 - 6 YRS POST GAMMA ZAP, 7 YRS MBC & 18 YEARS FROM ORIGINAL DX!
October 2014: hold avastin, continue HPX
Feb 2015 Cancer you lost. NEDHEAD 7 years post gamma zap miracle, 8 years ST4, +19 yrs original diagnosis.
Continue HPX. Adding back Avastin
Nov 2015 pet/ct is mixed result. L1 SUV is worse. Continue Herceptin/avastin/xgeva. Might revisit Perjeta for L1. Meantime going for rads consult for L1
December 2015 - brain stable. Continue Herceptin, Perjeta, Avastin and xgeva.
Jan 2016: 5 days, 20 grays, Rads to L1 and continue on HAPX. I’m trying to "save" TDM1 for next line. Hope the rads work to quiet L1. Sciatic pain extraordinaire :((
Markers drop post rads.
2/24/16 HAP plus X - markers are down
SCIATIC PAIN DEAL BREAKER.
3/23/16 Laminectomy w/coflex implant L4/5. NO MORE SCIATIC PAIN!!! Healing.
APRIL 2016 - 9 YRS MBC
July 2016 - continue HAP plus Xgeva.
DEC 2016 - PETCT: mets to sternum, lungs, L1 still about the same in size and PET activity. Markers not bad. Not making changes if I don't need to. Herceptin/Perjeta/Avastin/Xgeva
APRIL 2017 10 YEARS MBC
December 2017 - Progression - gonna switch it up
FEB 2018 - Kadcyla 3 cycles ---->progression :(
MAY30th - bronchoscopy, w/foundation1 - her2 enriched
Aug 27, 2018 - start clinical trial ZW25
JAN 2019 - ZW25 seems to be keeping me stable
APRIL 2019 - ONE DOZEN YEARS LIVING METASTATIC
MAY 2019 - progression back on herceptin add xeloda
JUNE 2019 - "6 mos average survival" LMD & CNS new single brain met - one zap during 5 days true beam SBRT to cord met
10/30/19 - stable brain and cord. progression lungs and bones. washing out. applying for ds8201a w nivolumab. hope they take me.
12/27/19 - begin ds8401a w nivolumab. after 2nd cycle nodes melt away. after 3rd cycle chest scan shows Improvement, brain MRI shows improvement, resolved areas & nothing new. switch to plain ENHERTU. after 4th cycle, PETscan shows mostly resolved or improved results. Markers near normal. I'm stunned but grateful.
10/26/20 - June 2021 Tucatinib/xeloda/herceptin - stable ish.
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Old 05-12-2018, 10:14 PM   #2
donocco
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Re: MYTESI new drug for diarrhea

SCG

I know a little bit about Mytesi. Even though Im basically a semi retired pharmacist I try to keep up with the new drugs. Mytesi stops diarrhea by blocking the secretion of Chloride ions with the accompanying water. I think the dosage is 125mg twice a day.\

As far as I can see it is FDA approved for diarrhea due to Aids drugs. Im not sure the insurance will be willing to pay for Her 2 Neu patients. I hope you can find a way around this. The main side effects of Crofelemer are bronchitis, acne like lesions and muscle pain. Hope this helps.
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Old 07-12-2019, 10:07 AM   #3
Nguyen
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Posts: 495
Re: MYTESI new drug for diarrhea

Thanks Paul, this will be very useful if we pick neratinib for the next step.

Nguyen
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