Mixed results 1 year after Forteo: What are your thoughts?
Hello all,
Recently I've pondering with my dexa results 1 year post Forteo treatment. There are so many involved factors which made it hard to pinpoint whats the main culprit for the negative part of the results.
Background and/Hx: 61yo diagnosed with op summer of 2022, no known fractures. No prior treatment of op including HRT. Started Forteo Sept. 2022. Comorbidities include mild cvd with hyperlipidemia which is controlled with a small dose of crestor; asymptomatic mild GERD w/o treatment and borderline pre-diabetic managed via lifestyle and diet.
At 13 mo post Forteo, Dexa results after vs before treatment are as follows:
L1-L4 spine: avg Tscore -3.1 vs -3.4, with a 4.9% bmd improvement. Each sub level also shows improvements;
Hip: avg Tscore -2.2 vs -1.8, with a -7.6% bmd decreasing!
TBS L1-L4: 1.318 vs 1.264, a 4.3% improvement.
P1NP is elevated in 400+
While I'm very happy with the spine and TBS improvements, the results for the hip/femoral region is very alarming, to say the least.
Has anyone of you experienced or heard of such discrepancy in results that Forteo would produce?
My immediate instinct is that I didn't exercise enough. I was only doing weigh/strength training with free weights consistently, targeting upper, lower and core, 15-20 reps x3-4, twice per week; with some walking and wearing weighted vest/backpack. Never thought about loading hip bones (but, I do quite a bit squats). After some reading I realized maybe I also need to increase amount of quality protein a bit. What's a good protein intake per kg body weight per day, in your opinion?
Anyhow, juggling among drug treatment choices as well as optimal nutrition, supplements and exercise is not an easy task.
Any opinions and suggestions are truly appreciated. The collective experiences and knowledge from patients are powerful!
UPDATE: March 30, 2024
My dexa scan 13 months post forteo therapy was reevaluated later and was found there were technical errors involved. My endo concluded that my femur neck and hip at both sides didn't have any significant change afterall. This is a good news to me. Although I wish I had some positive improvements at femur necks and hips, the results are within expectations. Thanks a lot to those who read my story. mayblin
Interested in more discussions like this? Go to the Osteoporosis & Bone Health Support Group.
Thank you. Very informitive.
very interesting. My endo has approved a third year for me to take Forteo injections, which began in July. I am a bit worried about any bone cancer risks, but I have to think that if he thought it was dangerous he would not have approved it.
@janflute I read that not a single human has gotten bone cancer from Forteo. The only concern, I think, is for those who have risk for metastatic cancer that can spread to bones. I have had high grade breast cancer and did Tymlos for two years and would gladly do more! Your doctor knows more about this and if you are uncomfortable with the prospect, maybe you can discuss it with them.
Thank you so much for your reassuring words. Dr Mannstadt is a wonderful doctor, but I only see him once a year, and really have no communication with him because he is so very busy.
There is new research that doesn’t limit the medication now to two years. You can ask your doctor if that is why he’s extending your treatment. Don’t be intimidated to ask questions!
Just about all doctors have a portal now for patient inquiries. They also have receptionist staff and nursing staff to help support especially for these medication‘s so call up and get a message to your doctor and make your questions concise, but please don’t be intimidated because somebody is ” busy“it’s your life that’s on the line. That’s the most important thing.
I was t taking offense. There are a lot of people here who do have bad doctors; there are also people here who have good doctors, but they are bad patients L O L! my endocrinology doctor has been a hard nut to crack as they say; so I had to push more than a little bit to get the information I deserved. It’s probably part and parcel of the medical system and the shortage of staff since the affordable healthcare act and Covid, I don’t blame anyone personally. It’s just a hard time to need medical services. Thank you for your input.
The Reclast infusion was August 2023. I started the Timos March 17, 2024. I did one month and stopped. I started the medicine again May 1, 2024. I took The P1 NP and the CTX at the beginning of June. And I just took the latest PNP last week, but it was strange that the CTX was not ordered. Do you think that it’s weird that the CTX was not ordered in companion to the P1 NP? or do you think the CTX was a marker for the reclast I took last year? (And maybe the thought is because I’m not having any more RECLAST before I finish The TYMLOS) maybe it’s not necessary? I did ask my regular primary care manager to order the CTX because I thought it was a companion to the P1 NP my surgeon last week said he thought my spinal vertebrae looked denser than six months ago, so that’s probably the best thing I could want to hear anyway. Your thoughts?
Thank you very much @loriesco for clarifying.
According to ACTIVE study, "early P1NP changes correlate with percentage change in lumbar spine BMD 18 months after abaloparatide (Tymlos) treatment". So your P1NP increase from baseline* (after 1 shot of reclast and some partial dosing of tymlos) of 49 to 90 at roughly 2 months of tymlos (5/1-7/1) is wonderful, considering you actually had reclast 7 months prior to Tymlos. Theoretically a strong antiresorptive like Reclast would have a strong and long lasting effect which suppresses osteoclasts (CTX reflects their activities) and consequently osteoblasts (P1NP reflects their activities). The fact that your P1NP responded strongly within 3 months Tymlos suggests Reclast may not 'blunt' too much of Tymlos' anabolic effect in your case. Your next Dexa will help confirming this.
Bone markers change dynamically after the start of an anabolic. With a prior treatment of reclast, your CTX changes likely won't follow the typical average changes shown in a trial data. It definitely is interesting to observe both p1np and ctx together especially with your sequence of therapy. However, since ctx is missed at 2mo, you might want to test both markers next time if neither lab ordering nor insurance payment presents a problem. Otherwise your p1np @2mo and the coming dexa would give you enough information.
Best of luck and please keep us posted!
Thank you!