Anyone starting brand drug, Enhertu?
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HER2 low and HER2- people don't respond as well to Enhertu as HER2+ grade 3 .
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I think extrapolate was actually meant as "elaborate."
I agree chocomousse about HER2 status. Enhertu seems extremely effective against those people who strongly express HER2. I'm just skeptical about the drug company's claims about HER2 low.
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So, after 11 infusions overall, 5 at the 4.4 mg reduced dose of Enhertu, my 4 cancer sites are gone, including the stubborn adrenal gland tumor. My CEA has stabilized at 2.2 and my CA27-29 dropped to 27.3. My team recommended a ctDNA test to see if I have any circulating tumor cells in my bloodstream. If the results are negative then we'll consider reducing the Enhertu to a maintenance dose of 3.2 mg.
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@chocomousse Nice news! I have had CtDNA tests for a while now. After my 15th infusion of Enhertu, the results are almost zero. They spiked big time when Truquap failed. These tests are still experimental and they can cost a ton unless your onc (like mine) can get them paid for by Signatera. I am not having issues on the full dose and I am no longer on any supporting meds except for the two hypos of anti-nauseals. I'm going to keep on this plan. New scans in a few weeks. I hope to be a good responder like you. I really don't mind going in for chemo every three weeks. As long as it works!
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That's really good news @onlywhenitrains!
Because of my last scan results, my Onc. thinks it'll be ok to space out the E/P to every 4 weeks. I'm still having stomach pain/nausea and showing signs of malnutrition.
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May have spoken too soon. My 2/2 lab work shows that my CEA went from 2.2 to 2.3 and my CA27-29 went from 27.3 to 30. Also, a 3.2 mg dose of Enhertu every 3 weeks is essentially the same as 4.4 mg dose of Enhertu every 4 weeks. Hoping that the tumor marker fluctuations are just noise or debris dumping given my scan results.
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@chocomousse Maybe your system will respond more favorably to a four-week schedule even if it's essentially the same dose. I don't get the marker tests that you do, but the fluctuations don't look bad to my untrained eye. What does your oncologist say?
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Hello,
I was diagnosed stage IV de novo in October, breast and mediastinal lymph nodes (possibility of lung as well but nodules were too small to biopsy) ER 20%, PR 40% Her2 negative in breast but low positive (+1) in metastasis and high Ki67 80-90%. No gene mutations. At 42, with no family history and doing regular checks, this was the last thing on my mind. There have been a lot of tears but my wonderful husband and our 8yo son keep me going.
Started targeted therapy in November with Kisqali and hormone suppressants but had to pause due to elevated liver enzymes. In the meantime progression was shown in my restaging ct scan so my onco team decided to switch me to iv Enhertu once every 3 weeks. They also suggest stopping the hormone suppressants as they don’t really improve anything.If anyone can share their experience and advice it’d be greatly appreciated. Wishing everyone a lot of strength and success in their journey!
Elena
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@elena_p Welcome to this topic. Sorry to hear that your time on targeted therapy was short. I've been on Enhertu for almost a year with no complications and very few side effects. Aside from cataracts which were very likely caused by the steroids, My cataracts are fixed and I am off the steroids.
If you want to put your treatment history on your comments, you can go to Quick Links on the right side of your screen and click on "Signature Settings." It took me a while to figure this out.
Best wishes on your treatment! Have you started yet?
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Hey @onlywhenitrains !
Thanks for welcoming me and the signature tips 😉
Losing my first line of treatment that fast was a bummer, for sure, but we couldn’t risk permanent damage to my liver. Additionally, the ribociclib/hormone therapy wasn’t enough.. Definitely not the news I hoped for but I’ll do anything to stay ahead of this beast.
My first infusion is scheduled in 10 days, thankfully I already had a port inserted back in October when we still thought I was stage II. We just need to wait a bit cause I’m weaning off the steroids. I’ve never had any chemo so I don’t really know what to expect. Thank you for sharing your experience with me!
Elena1 -
mbilhae
Hello everyone. I have been on the generic brand of Enhertu (Fam-Trastuzumab deruxtecan) since 10/21/2025, state IV mets since 2022. I was wondering if anyone on this forum has had serious side effects or symptoms with the drug. I am having multiple issues. I am currently on half dose since December 2025, it was decided to reduce to see if the symptoms would clear up. I had treatment on 02/10/2026, the neuropathy in my fingertips, legs and feet has flared up again.
My scans in January were positive; I had a reduction of the tumor in my right anterior lung. I wonder if the half dose will work as well.
What is the typical length of treatments that everyone has?
Stay strong everyone!
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@mbilhae.148 I am going to get my 17th treatment on Thursday. I have not had serious side effects while on Enhertu aside from cataracts from the supporting steroids. Got my eyes fixed and my slightly sluggish digestive issues and bouts of fatigue are in the rearview mirror. But since I'm not HER +, perhaps my positive response won't be long-lasting? I'm definitely more nervous scan to scan than I was when I was on Ibrance, but from what I can tell, Enhertu is the next best thing for me. Not Ibrance 2.0, but as close as I can get. Not sure if I'm typical. All the best to you.
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Hey all,
just checking in after my first infusion. It started very smoothly and for the first 2-3 days I was feeling fine, I guess all the supporting drugs they infuse us with work wonders. The only problem was the big C despite the laxatives I was taking daily. Then days 4-6 were an absolute blur, to be honest. Extreme fatigue, complete loss of appetite and I was just trying to sleep it off. I don't remember ever sleeping so much and it was never enough. I definitely didn't hydrate properly or get enough nutrients. Yesterday was the first day I was able to shower while standing and walked to my GP's to get my blood work done. Today I'm pretty functional, started working again (home office) but am mindful of my limits and take small breaks and snacks.
I hope you're all having a good week so far!
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@mbilhae What Enhertu dose are you on now? My first 4 doses were at 5.4 mg which was then reduced to 4.4 mg due to the debilitating side effects/extreme weight loss. I started Enhertu & Perjeta in June and by September, the lymphadenopathy and 1 out of 2 lung tumors had cleared. By Jan. my CT scan showed complete clearance of the adrenal gland tumor and the 2nd lung tumor although we're not 100% sure if it's scar tissue or tumor. If I had been given a PET scan instead of a CT, we would know definitively. So, I achieved a complete response while on the reduced Enhertu dose but I'm also on Perjeta.
I'm on E/P every 4 weeks instead of every 3 weeks now and am still awaiting the results of my Signatera test, which have been delayed. And because of a coverage lapse, they want to push out my next infusion to 5 weeks which is scaring me.
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So my Signatera test result is negative. *tears*
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Hi all!
I found this fantastic site years ago when I was going through breast cancer the first time in 2000. I was age 33, stage 2A. I did all the things, was NEAD until re-dx in October 2012 - mets to lungs and bones (all thru spine, hips, pelvis, etc.) at 46 years old. I've been on oral chemo and or hormone therapy all this time, with a pretty good quality of life physically. I have never quit working. Not the first time, and not last 13.5 years. Last year, my bad back (which predates any cancer) flared up with such unbelievable pain it was terrifying. I begged for pain meds from Onc - that went NOWHERE, and she referred me out to Ortho and Pain doc. Ok - cool.
Ortho does MRI and says - wow. Your lumbar spine is so eaten away and actively crumbling, that the rest of your spine in literally collapsing into your lumbar spine. Welp! Like - all the CTs didn't show this. Eye roll. Plus extra fractures other than the obvious as well. I scheduled spinal fusion surgery with him last July. After the recovery, I felt ZERO pain. None. Then…long story short - 5 x 5 centimeter round tumor at L5 pushing into the spinal canal. Hospitalized on Xmas for pain control, got better, and for 3 weeks now I currently have left foot drop, cannot walk properly blah blah.
So - was told a bunch last Thursday as to my new plan:
10 rads starting next Tuesday on the tumor.
Getting a port - I've never had one. (Yes really)
Getting Echo for heart tomorrow along
Abdominal MRI to rule in/out tiny liver mets
If they see them on mri - Liver biopsy
Enhertu Cycle 1, March 13.
Work - have asked for accommodation for now - planning STD giving all your stories. Just can't deal with one more thing at the moment. Also had to out myself at work.
I feel like I went from 0-60 in these last 3 weeks.
Thanks for listening…
LL
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@lizlemon2 What a saga. I've had a good response to Enhertu with few side effects after many easy years on pill chemo. (Not half as long as you, though!) 17 infusions so far. It took my body a little time to adjust, but right now, I'm off the steroids and living my regular life. Before I started Enhertu, I canceled a Slovenian trip because I had no idea how I would deal with infusion chemo. Turns out I could have gone, but I think it's right to be cautious about working. I never had a port, either, and I did have some issues. I had to get a second port because the first one detached or something. The second one was problematic at first, but it's good now. I've had two liver biopsies and two port surgeries. Not fun, but fine. However, I have not had bone issues (aside from osteonecrosis of the jaw - ha, ha), so I am hoping your radiation kicks out your L5 tumor. Sorry you have reason to get back on these forums, but I agree, this place is good. Fear, panic, sure, but mostly reasonableness and insight.
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@lizlemon2 The Enhertu should clear up everything. It really is a miracle drug. Are you HER2+?
@onlywhenitrains Have you had a Signatera?
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@chocomousse Yes, I've had 8 Signatera ctDNA tests. The results have tracked with my scans. At this point, I am not below zero, but close enough for my positive result to be labeled "not clinically significant." Natera has paid for all of my tests, but they are now going back and trying to get some reimbursement from my insurance. I went on Medicare during these 8 tests and they never got the updated info. So, unfortunately, I am in a HELLSCAPE VORTEX of emails coming from three separate arms of the company trying to figure out who to re-submit claims to. I'm not sure if these are bots or actual people, but they don't appear to be communicating with each other. If I have to pay for one of these tests myself, I am not inclined to continue. It would be $4900. I get scans every three months now that I am on Enhertu so I don't "need" any other indicators. Happy for you to be negative and I hope you don't get into any kind of HELLSCAPE VORTEX. Thanks for listening.
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@elena_p From what I can tell from personal experience and reading the posts on this thread, it gets better. You sound like you are very strong. Walking to an appointment after all you had been through! For the next round, maybe stock up on foods that you like so that you can get to the kitchen for a small easy snack when the fatigue takes you down. I like cottage cheese and pineapple, peanut butter and jelly on English muffins and yogurt and granola. Salami and cheese. Ice cream. Cold pizza. I've listened to nutritionists talking to patients next to me while I've gotten infusions. Often, they say, "Just freaking eat!" Of course, keep water next to you at all times.
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Thanks for the tips, @onlywhenitrains ! Yeah I spent the first post infusion days trying to eat food that was very healthy and nutritious but could not stand the smell or textures. It felt wrong to just eat bread and cheese although this was the only thing I could stomach at that point. Next time I’m definitely taking it easy and will listen to my body more, any food is way better than no food at all! Surprisingly I craved my son’s sour candy but ok i didn’t go that far 😅
This week I was feeling a lot better but I got the dreaded call from the hospital, my neutrophils dropped to 0.3 😫 I’m now on antibiotics and wait to see if I’ll be well enough to get my second infusion on Wednesday. Doctor said it’ll be a lower dose, I was relieved cause less side effects. I only hope it doesn’t affect its efficacy!
Wishing everyone a lovely weekend!
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@elenap Eat some sour candy! I try not to eat processed foods, but when I get an infusion, I treat myself to bag of Lay's potato chips. Provided by the hospital. Bread and cheese? If that's what you need, I wouldn't sweat it. I hope you are well enough for your next infusion and the side effects are not as severe as you had after your first.
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elena_p What dose of Enhertu will they be switching you to?
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