Switching from Orgovyx to Bicalutamide

Posted by namrac @namrac, Jun 20 2:26pm

Hi everyone,
I’m looking for insight or personal experiences with Bicalutamide as a follow-up or alternative to Orgovyx.
I’ve been on Orgovyx (relugolix) for about 14 months, starting it approximately 3 weeks before radiation. I was diagnosed with Gleason 4+3 and stage 4a prostate cancer (due to local spread). I’ve had a great response so far – my PSA is currently < 0.01, and I’m scheduled to stay on ADT for 18 months total.
The problem is, I’m experiencing severe side effects from Orgovyx – practically every known one – and my quality of life has really taken a hit.
My radiation oncologist suggested switching to Bicalutamide, even though it's an older drug. He says he’s had good results with it. I’m a bit hesitant, mainly because:
1. Bicalutamide doesn’t lower testosterone like Orgovyx – is it enough for someone with high-risk or stage 4a disease?
2. I’ve read that Bicalutamide can cause liver toxicity. Has anyone experienced this?
3. Would switching at this point (14 months in) reduce cancer control effectiveness, or could it serve as a “bridge” for the final few months?
Has anyone here:
• Switched from Orgovyx to Bicalutamide?
• Used Bicalutamide as monotherapy or in combination?
• Had liver or other significant side effects?
Would really appreciate hearing about your experience or what your doctors have advised.

Interested in more discussions like this? Go to the Prostate Cancer Support Group.

Profile picture for jime51 @jime51

I'm at six months on Orgovyx and after 44 radiation treatments, with Gleason 4+3 and N1M0, iliac lymph nodes and latest PSA 0.01, testosterone 0. I'm campaigning with my oncologist to switch to a similar drug, Darolutamide, after one year. I've met a gentleman online who has used Darolutamide alone since August. Latest Testosterone 1100, PSA undetectable, former lymph node activity also undetectable. His Dr. Hugec in Minnesota has reportedly 20 patients on this monotherapy. I too have experienced every Orgovyx side effect with fatigue being the major daily issue. Exercise helps some: I had an unrelated surgery recently and without daily exercise, fatigue has been really slamming me. Darolutamide/Nubeqa seems to have lesser influence on fatigue, brain fog, and heart issues. By switching, I'm hoping to lessen side effects and prevent the cancer becoming castrate resistant.

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Hi Jiime - do you have any insights on why Dr. Hugec's patient has a total testosterone of 1100 while using Darolutamide, an androgen receptor antagonist? A 1100 ng/dL level is quite high and suggests the patient is receiving testosterone replacement therapy (TRT).

I haven't heard of these two being used together. I'm thinking Darolutamide and TRT would likely oppose each other.

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Profile picture for kenk1962 @kenk1962

Hi Jiime - do you have any insights on why Dr. Hugec's patient has a total testosterone of 1100 while using Darolutamide, an androgen receptor antagonist? A 1100 ng/dL level is quite high and suggests the patient is receiving testosterone replacement therapy (TRT).

I haven't heard of these two being used together. I'm thinking Darolutamide and TRT would likely oppose each other.

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He says he's only receiving the ARPI which allows Testosterone to rise while keeping the cancer cells from feeding on it (Androgen Receptor Pathway Inhibitor). His recurrence in three lymph nodes has disappeared, avoiding additional treatment for now.

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Profile picture for round5 @round5

I’m one of Dr.Hugecs patients on darolutamide mono therapy. Too early to comment on whether it’s working because I just stopped my Lupron a few months ago and testosterone is still below 20. I would like to communicate with the person you met who has been on it since August? I’ve not been able to find anyone yet but Dr.Hugec did tell me he had others doing it.

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The person you mentioned may be me. I’m 75. My urologist is Dr. Kwon of Mayo who referred me to Dr. Hujec for chemo. I was diagnosed Stage 4b metastatic Gleason 9 about 30 months ago. Started Lupron soon thereafter and added darolutamide with chemo. Subsequently did SBRT. Stopped Lupron after 13 months and am still on darolutamide mono therapy. Do PET scans every three months. My PSA is negligible. Dealing with fatigue issues. Physical therapy has helped.

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Profile picture for mmacaulay @mmacaulay

The person you mentioned may be me. I’m 75. My urologist is Dr. Kwon of Mayo who referred me to Dr. Hujec for chemo. I was diagnosed Stage 4b metastatic Gleason 9 about 30 months ago. Started Lupron soon thereafter and added darolutamide with chemo. Subsequently did SBRT. Stopped Lupron after 13 months and am still on darolutamide mono therapy. Do PET scans every three months. My PSA is negligible. Dealing with fatigue issues. Physical therapy has helped.

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The way to deal with the fatigue is to get out there and exercise. Walk a couple of miles a day maybe three or four, That really does seem to help with the fatigue for me at at least.

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I was Gleason 9, Decipher .99 and Stage 4a. Surgery + ADT (Orgovyx) + pelvic radiation. I've been on Orgovyx 29 months total, 25 months since radiation. PSA < 0.01 since radiation + Orgovvx (25 months). I've had no serious side effects from Orgovyx. Only SE so far have been joint and muscle weakness and low energy and easily tired. I've not had testosterone level checked. My Dr's are suggesting I come off ADT. I don't want to; scared that PSA will start to go up. Why mess up what seems to be working just fine?

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Profile picture for ga73ds @ga73ds

I was Gleason 9, Decipher .99 and Stage 4a. Surgery + ADT (Orgovyx) + pelvic radiation. I've been on Orgovyx 29 months total, 25 months since radiation. PSA < 0.01 since radiation + Orgovvx (25 months). I've had no serious side effects from Orgovyx. Only SE so far have been joint and muscle weakness and low energy and easily tired. I've not had testosterone level checked. My Dr's are suggesting I come off ADT. I don't want to; scared that PSA will start to go up. Why mess up what seems to be working just fine?

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My doctor recommended 1000 IU or 25 mcg of vitamin D and 1000 mg of calcium while on ADT to help with bone health. Dunno if it could help with joint and muscle weakness. Exercise with weights is supposed to help.

If i get to 24 months on ADT (am only almost 3 months in) and radiation then I would want to try to stop or taper off to see if my psa would stay down. I am Gleason 8 and .86 but it’s still high risk. If they think they can put it into remission I think I will want to see if it is. It would be nice to be able to get off the drugs one day. But I imagine it can be scary and would suck if it comes back up.

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Profile picture for ga73ds @ga73ds

I was Gleason 9, Decipher .99 and Stage 4a. Surgery + ADT (Orgovyx) + pelvic radiation. I've been on Orgovyx 29 months total, 25 months since radiation. PSA < 0.01 since radiation + Orgovvx (25 months). I've had no serious side effects from Orgovyx. Only SE so far have been joint and muscle weakness and low energy and easily tired. I've not had testosterone level checked. My Dr's are suggesting I come off ADT. I don't want to; scared that PSA will start to go up. Why mess up what seems to be working just fine?

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Could maybe ask doctors if they recommend darolutamide or similar after stopping Orgovyx. Maybe a way to still guard against recurrence, dunno. Of course I don’t know what the right thing to do is, and the doctors have probably considered all this.

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Profile picture for jeff Marchi @jeffmarc

I realized I didn’t answer all of your questions.

I did stop Orgovyx For eight months and was on Darolutamide Alone for that time. My PSA stayed undetectable the whole time.

The problem is that even after eight years on ADT my Testosterone started coming back quickly. Because I am BRCA2 My oncologist thought it would be best that I start back on Orgovyx when my testosterone went over 50.

Over at the advanced prostate cancer weekly meeting of Ancan.org. You will find that there are a number of people that are on Darolutamide alone. It is very effective with people that are not on ADT to suppress their testosterone.

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Thank you Jeff I have afib already and am taking rythmol for it I have to space it 12-hours after ogorvyx. I am taking a picture of your reply to discuss darolutamide with my hematologist-oncologist as it’s sounds like a great alternative. I have not yet experienced any afib events of severity yet, just my normal controlled afib.

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Thanks so much to everyone for the replies — I really appreciate the input. I do get regular exercise by walking 3 to 5 miles a day. I don't do lifting since incontinence is a problem,
Since I’m an open book and everyone’s experiences have been really helpful, I’m sharing my latest labs below:
10-Jun-2025:**
Method: Access Hybritech Chemiluminescent Immunoassay*
Total Testosterone:** < 10.0
Free Testosterone:** 1 pg/mL *(below threshold)*
% Free Testosterone:** 2.0%
SHBG (Sex Hormone Binding Globulin):** 26 nmol/L
Albumin:** 4.4 g/dL *(range: 3.5–5.2)*

Quality of life is not he best on Orgovyx which is the reason to change to Bicalutamide 50 MG Oral Tablet , just a bit nervous since Orgovyx is working well on the cancer but not my body.

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