Forteo (teriparatide) followed by HRT: My Experience

Posted by mayblin @mayblin, Sep 29, 2025

I wanted to start a thread sharing my experience with Forteo → HRT, since this treatment sequence is less discussed but may be very helpful for other women navigating osteoporosis.

I was diagnosed with osteoporosis at age 59. My lowest T-score was –3.4 at the lumbar spine, with hip and femoral neck in the osteopenia/borderline osteoporosis range. My endocrinologist ruled out secondary causes. Without a family history, postmenopausal estrogen deficiency seemed the most likely contributor, though low BMI, protein intake, and activity level/type may have played a role.

Shortly after diagnosis, I improved my diet and added weight-bearing exercise. I started Forteo (teriparatide) within a few months and continued for 22 months. P1NP was 137 µg/L at the end of Forteo.

At age 61 (11 years postmenopausal), I transitioned to HRT: transdermal estradiol 0.025 mg/day patches plus oral micronized progesterone 100 mg/day. It’s now been 15 months on HRT. CTX stayed 110–130 pg/mL after 6mo starting HRT.

Since the start of Forteo to 15 months on HRT, my results have improved as follows:
• Lumbar spine T-score: –3.4 to –1.9
• Total hip T-score: –2.2 to –1.7
• Femoral neck T-score: –2.5 to –1.8
• TBS: 1.264 to 1.34

All DXA scans were performed on the same machine by the same technician. Detailed DXA results, including percent changes from previous scans and baseline, T-scores, and TBS values, are presented in the attached spreadsheet if anyone is interested.

Between my last two DXA scans, I also used three leftover Forteo pens with off-label dosing.

Note: I use the term “HRT” because it’s widely recognized. In medical literature, “MHT” (menopausal hormone therapy) is the standard term. In my case, I used regulated, body-identical estradiol and micronized progesterone, sometimes referred to as bHRT.

Thanks for reading! I would love to hear your thoughts, experiences, and insights. Also please feel free to ask any questions.

Interested in more discussions like this? Go to the Osteoporosis & Bone Health Support Group.

Profile picture for lynn59 @lynn59

I’ve been on teraparatide (Canadian version of Forteo called Osnuvo) for 22 months. I’m supposed to stop on April 10th and have a DEXA scan scheduled for April 2nd. I was supposed to see my endocrinologist on April 16th for a next step consult, so I was thinking of taking the drug one week longer to reduce the time in between my consult and stopping the drug. My endocrinologist has decided to go away now and can’t see me until April 30th, and I can’t get any advice from her office on whether I should stay on the drug for a month longer.

My endocrinologist is supposed to be the absolute best in Canada and is world renowned, but getting in to see her is frustrating. I’m wondering if I should start BHRT now and if that will help me hold on to my gains. What is his Menostar? I have minor calcification in one artery. Should that stop me from taking it?

I’m afraid of the Reclast injection too, but I think it’s the best option to lock in gains? I’m 67 years old, 19 years post-menopausal and very active, including aggressive downhill skiing. I started at -3.5 in spine and -2.7 in my hips. I’m hoping for -2.5 results 🤞

Any thoughts or advice?

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@lynn59
As far as starting BHRT, I had to take matters into my own hands. At the time I was wanting to start, all of the drs I saw said no. I didn't necessarily like that answer. I scheduled appts with a cardiologist for testing, which took 5 months to wait for an open appt since I wasn't referred by anyone. You may want to get some tests done for your own assurances and also get the cardiologists opinion. I had a stress test, cardio ultrasound and a cardiac CT. All were fine and my cardiac score was a 0. I did find out that I have a small, unconcerning heart murmur, but that was a non issue. So I took that as a go and then found a gynecologist who wasn't afraid to prescribe hormones for someone over 65 and 18 yrs post menopause. I'm 68 now. That took another 3 months! So what I wanted to do mid year 2024 took until Sep 2025 to start. Oh well......progress takes time!
Good luck and stay persistent!

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Profile picture for lynn59 @lynn59

I’ve been on teraparatide (Canadian version of Forteo called Osnuvo) for 22 months. I’m supposed to stop on April 10th and have a DEXA scan scheduled for April 2nd. I was supposed to see my endocrinologist on April 16th for a next step consult, so I was thinking of taking the drug one week longer to reduce the time in between my consult and stopping the drug. My endocrinologist has decided to go away now and can’t see me until April 30th, and I can’t get any advice from her office on whether I should stay on the drug for a month longer.

My endocrinologist is supposed to be the absolute best in Canada and is world renowned, but getting in to see her is frustrating. I’m wondering if I should start BHRT now and if that will help me hold on to my gains. What is his Menostar? I have minor calcification in one artery. Should that stop me from taking it?

I’m afraid of the Reclast injection too, but I think it’s the best option to lock in gains? I’m 67 years old, 19 years post-menopausal and very active, including aggressive downhill skiing. I started at -3.5 in spine and -2.7 in my hips. I’m hoping for -2.5 results 🤞

Any thoughts or advice?

Jump to this post

@lynn59
Oh sorry,,, should have also mentioned that my estradiol is a patch not a pill. The form you use does make a difference as far as risk factors. Mine is not the Menostar brand, but I think Menostar is a patch as well. (?) The patch delivers directly to your bloodstream and does not require being processed through the digestive system, liver, etc. where any issues, if they happen are slightly increased because of this.

I'm sure you have increased nicely after 22 months of teriparitide. I feel the same about Reclast. To the point that I'm not going to do it. I'm also active, but your downhill skiing has to be a help to your density. You definitely have impact and push and pull on your bones. I lift weights and do a lot of weighted jumping. Hoping that is doing something.

Sorry if this is kind of a disjointed reply...trying to watch the olympics (snowboarding....talk about impact?!?!) and type!
Cheers!

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Profile picture for psmnonna @psmnonna

@tillymack
I am on a .025 estradiol patch and 100mg micronized progesterone capsule, daily. The patch is bi weekly. The estradiol is a low dose. I'm going to talk to my gyn after I make the 6 mo. mark, so in March, to see if I can bump up to the next dose. I'll be off Tymlos by then, so maybe need to focus on optimizing my estradiol dose. I'll also request to get my hormone levels tested. I asked at both earlier visits with her, but she said they wouldn't tell anything because of my age. Not sure I agree, so asking with more intention next time. Lol

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@psmnonna I happened to watch a youtube video with Dr. Susan recently. She mentioned that there are independent labs that will run an estradiol level without a doctor's order. I haven't seen anything like that in my area but haven't looked into it either.

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Profile picture for lynn59 @lynn59

I’ve been on teraparatide (Canadian version of Forteo called Osnuvo) for 22 months. I’m supposed to stop on April 10th and have a DEXA scan scheduled for April 2nd. I was supposed to see my endocrinologist on April 16th for a next step consult, so I was thinking of taking the drug one week longer to reduce the time in between my consult and stopping the drug. My endocrinologist has decided to go away now and can’t see me until April 30th, and I can’t get any advice from her office on whether I should stay on the drug for a month longer.

My endocrinologist is supposed to be the absolute best in Canada and is world renowned, but getting in to see her is frustrating. I’m wondering if I should start BHRT now and if that will help me hold on to my gains. What is his Menostar? I have minor calcification in one artery. Should that stop me from taking it?

I’m afraid of the Reclast injection too, but I think it’s the best option to lock in gains? I’m 67 years old, 19 years post-menopausal and very active, including aggressive downhill skiing. I started at -3.5 in spine and -2.7 in my hips. I’m hoping for -2.5 results 🤞

Any thoughts or advice?

Jump to this post

@lynn59
You might ask copilot until you can speak with your doctor. Ask it to check all research and standard practices.

Artery calicification....might do some research on Vit k2; it has shown great in research trials for redirecting calcium and undoing calcification. There was even a book written about the phenomenon. Vitamin K2 And The Calcium Paradox.
https://www.ahajournals.org/doi/10.1161/CIRCULATIONAHA.121.057008.

REPLY
Profile picture for mayblin @mayblin

@lynn59
I also have some mild coronary artery calcification - my cac score is 38. I consulted with 2 cardiologists, and both reassured me that HRT is reasonably safe in my case, though they both set target goals for my LDL-c and HbA1c. Have you had a chance to speak with a cardiologist about your situation?

Since HRT takes a few months to reach its full antiresorptive effect, the ideal timing for starting it isn't entirely clear. I began right after finishing Forteo, while psmnonna overlapped hers with Tymlos. In the end, both approaches seem to have worked, based on our DXA results.

Please keep us posted on what you decide and how things progress. I'm rooting for you.

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@mayblin thanks as always for response. I have talked to my cardiologist about it and he felt I should stick with the osteoporosis medications, as he said there are decent choices out there now. He wasn’t completely against BHRT, but he felt the risks may not outweigh the benefits. He said pulmonary embolisms are likely my biggest risk with estrogen. I’m 18 years post menopausal and 67 years of age. You were right on the cusp of the medical arbitrary cut-off of 10 years post-menopausal and 60 years. of age. I do really want to go on it, but I am afraid. Strokes and embolisms are killers, not just side effects. And that’s what scares me, yet I’m still strongly pulled to it as it just feels more right than Reclast.

REPLY
Profile picture for psmnonna @psmnonna

@lynn59
Oh sorry,,, should have also mentioned that my estradiol is a patch not a pill. The form you use does make a difference as far as risk factors. Mine is not the Menostar brand, but I think Menostar is a patch as well. (?) The patch delivers directly to your bloodstream and does not require being processed through the digestive system, liver, etc. where any issues, if they happen are slightly increased because of this.

I'm sure you have increased nicely after 22 months of teriparitide. I feel the same about Reclast. To the point that I'm not going to do it. I'm also active, but your downhill skiing has to be a help to your density. You definitely have impact and push and pull on your bones. I lift weights and do a lot of weighted jumping. Hoping that is doing something.

Sorry if this is kind of a disjointed reply...trying to watch the olympics (snowboarding....talk about impact?!?!) and type!
Cheers!

Jump to this post

@psmnonna thanks so much for the valuable information. You are in the same age range and years of being postmenopausal. I do have some calcification in my arteries though. When I did go to see a hormone doctor, she said there is a risk in the first year of using a low dose estradiol patch (along with progesterone) of some plague dislodging and causing a stroke. That scared the daylights out of me, so I didn’t move forward. She was unable to give me a percent risk!

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Profile picture for mcchesney @kathleen1314

@lynn59
You might ask copilot until you can speak with your doctor. Ask it to check all research and standard practices.

Artery calicification....might do some research on Vit k2; it has shown great in research trials for redirecting calcium and undoing calcification. There was even a book written about the phenomenon. Vitamin K2 And The Calcium Paradox.
https://www.ahajournals.org/doi/10.1161/CIRCULATIONAHA.121.057008.

Jump to this post

@kathleen1314 thanks I used AI to help me write a letter to my endocrinologist and it worked. I got a timely appointment which was a real win for me!! I take adequate amounts of vitamins D and 100-120mg of K2 as well. I started K2 about two years ago, so that would be a real win if halted or slowed progression of calcification.

REPLY
Profile picture for mayblin @mayblin

@psmnonna
First of all, congratulations on your amazing improvement! I'm truly happy for you.

It's really interesting that our starting Tscore were so similar and that we've both ended up in a similar range. From what you shared, you reached a lumbar Tscore of -2.5 after two years in Tymlos, with the last 6mo combined with HRT. In comparison, mt lumbar Tscore improved to -2.9 after 22mo on Forteo alone, and then to -2.3 after 6mo of HRT alone. My bmd gains with Forteo were modest at first, but there was a noticeable jump during the 6mo of HRT alone. This was explained to me by an endo who is familiar with btms and HRT that my high bone turnover state while on Forteo (even at the end of treatment) may have helped extend the anabolic window. I also wonder if adding HRT toward the end of your Tymlos helped continue the bone-building effect. I do wish you had bone markers tracked along the way - it would've been fascinating to see how they changed over time and what insight they might offer.

Since my table may look a bit busy, here's a short version of my sequence: 22mo of Forteo alone -> 6mo of HRT alone -> 5mo HRT plus a small overlap with Forteo (3 pens, various dosing regimen) -> HRT alone afterwards. So my last DXA wasn't purely HRT data because it still reflected that brief overlap with Forteo. The next scan will be the first one showing HRT alone, which should give a much clearer picture of whether bmd is being maintained. So far, my bone markers have been reassuring - my CTX has remained quite suppressed at low 100s on HRT alone.

Like you, I don't have a bone marker baseline. You might consider asking your doctor to order labs, or even self-order online, just to see where your CTX is at now, and especially on HRT alone in the near future. This could reassure you that your bone turnover is adequately suppressed during the antiresorptive phase on HRT alone, which will support the case that you don't necessarily need to switch to or add a bisphosphonate.

It is said that estrogen is a stronger antiresorptive than raloxifene, so it should be effective, though individual response and dosing can vary. We share the same thought that estrogen can be a more natural antiresorptive option, provided the benefits outweigh the risks. Since its effects are readily reversible, it won't "lock" bone turnover into a long term suppressed state the way some other agents might. That flexibility, especially if repeated anabolic treatment is ever needed in the future, feels like a meaningful advantage.

If you decide to check btm, you could test CTX (with or without P1NP) at 1 and 3mo after being on HRT alone. If one test is preferred, around 2mo in might be reasonable since you've already been on HRT for 6mo.

I'm really encouraged by your great news. Let's keep comparing notes as we go.

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@mayblin Congrats on your improvements and being so informed to choose the right path for you. As much as I am intrigued by HRT for follow up, I am also hesitant because prior to my quick decline in bone density, I had been taking estradiol for several years I stopped after menopause and that's when I started fractures . I had been unable to tolerate bisophamates and because of that, I think Forteo worked well for me. One shot of Prolia after two years of Forteo was a disaster on my dental health, so I switched to Raloxifene , which held my gains for 8 more years. Raloxifene is easily available and covered by my insurance. Pretty much zero side effects. It says it acts as a hormone and protects agains some breast cancers. Feels like a safer option to use this again, and back up plan would be to go back on Forteo if I needed another boost in 5 years time. Reclast sounds too risky and Evenity is made by Prolia, so I do not trust it either. Tricky though, because it seems if you don't follow advice of your endocrinologist they will just refer you off to someone else and I believe we need a Endocrinologist special authority request to get Forteo, especially a repeat course of it. Scary journey. I am a poor case study because since my 13 compression fractures, they can no longer read my spine for bone density, which is where Forteo mainly does the most work.

REPLY
Profile picture for mayblin @mayblin

@psmnonna
First of all, congratulations on your amazing improvement! I'm truly happy for you.

It's really interesting that our starting Tscore were so similar and that we've both ended up in a similar range. From what you shared, you reached a lumbar Tscore of -2.5 after two years in Tymlos, with the last 6mo combined with HRT. In comparison, mt lumbar Tscore improved to -2.9 after 22mo on Forteo alone, and then to -2.3 after 6mo of HRT alone. My bmd gains with Forteo were modest at first, but there was a noticeable jump during the 6mo of HRT alone. This was explained to me by an endo who is familiar with btms and HRT that my high bone turnover state while on Forteo (even at the end of treatment) may have helped extend the anabolic window. I also wonder if adding HRT toward the end of your Tymlos helped continue the bone-building effect. I do wish you had bone markers tracked along the way - it would've been fascinating to see how they changed over time and what insight they might offer.

Since my table may look a bit busy, here's a short version of my sequence: 22mo of Forteo alone -> 6mo of HRT alone -> 5mo HRT plus a small overlap with Forteo (3 pens, various dosing regimen) -> HRT alone afterwards. So my last DXA wasn't purely HRT data because it still reflected that brief overlap with Forteo. The next scan will be the first one showing HRT alone, which should give a much clearer picture of whether bmd is being maintained. So far, my bone markers have been reassuring - my CTX has remained quite suppressed at low 100s on HRT alone.

Like you, I don't have a bone marker baseline. You might consider asking your doctor to order labs, or even self-order online, just to see where your CTX is at now, and especially on HRT alone in the near future. This could reassure you that your bone turnover is adequately suppressed during the antiresorptive phase on HRT alone, which will support the case that you don't necessarily need to switch to or add a bisphosphonate.

It is said that estrogen is a stronger antiresorptive than raloxifene, so it should be effective, though individual response and dosing can vary. We share the same thought that estrogen can be a more natural antiresorptive option, provided the benefits outweigh the risks. Since its effects are readily reversible, it won't "lock" bone turnover into a long term suppressed state the way some other agents might. That flexibility, especially if repeated anabolic treatment is ever needed in the future, feels like a meaningful advantage.

If you decide to check btm, you could test CTX (with or without P1NP) at 1 and 3mo after being on HRT alone. If one test is preferred, around 2mo in might be reasonable since you've already been on HRT for 6mo.

I'm really encouraged by your great news. Let's keep comparing notes as we go.

Jump to this post

@mayblin Today I had to accept a different brand of the Teriparatide after being on one other brand for 16 months. The pharmacist went to the trouble of contacting my insurance to get it covered as my other brand was not available. He says this is happening more and more with specialized drugs. We research a drug and then halfway through get a substitute . Yikes!

REPLY
Profile picture for lynn59 @lynn59

@mayblin thanks as always for response. I have talked to my cardiologist about it and he felt I should stick with the osteoporosis medications, as he said there are decent choices out there now. He wasn’t completely against BHRT, but he felt the risks may not outweigh the benefits. He said pulmonary embolisms are likely my biggest risk with estrogen. I’m 18 years post menopausal and 67 years of age. You were right on the cusp of the medical arbitrary cut-off of 10 years post-menopausal and 60 years. of age. I do really want to go on it, but I am afraid. Strokes and embolisms are killers, not just side effects. And that’s what scares me, yet I’m still strongly pulled to it as it just feels more right than Reclast.

Jump to this post

@lynn59
You might want to revisit the information which you have received and speak again with your doctor.

BHRT does not carry the risks of pulmonary embolisms which were enumerated in the old WHI study. Indeed, the problem seems to be older HRT, progestins and oral BRHT or HRT, not topical, vaginal or non oral drugs.

Oral drugs carry the problem of first pass problems in the liver of which VTE is associated. When you swallow a hormone pill, it is absorbed through the digestive tract and sent immediately to the liver before entering general circulation. This concentrated exposure triggers several specific biological changes in the liver that increase embolism risk.
Creams, topical or non oral do not have this problem.

The research shows over and over again that topical , vaginal non oral BHRT is the safest method of HRT and indeed confers benefits which make it more than worth a second look and possible use.

The BMJ (2019) Nested Case-Control Study: This massive study of over 80,000 women is the most cited for comparing different therapy types. It found that transdermal estradiol (a common bioidentical form) was not associated with an increased risk of VTE, whereas oral preparations (including bioidentical estradiol) significantly increased the risk.
Read the full BMJ study here. https://www.bmj.com/content/364/bmj.k4810

The ESTHER Study (2003/2007): One of the first major trials to demonstrate that transdermal estradiol does not increase clotting risk, even in women with high-risk factors like obesity or prothrombotic mutations. It also noted that micronized progesterone (the bioidentical form) appears safer for VTE risk than synthetic progestins like MPA.
Read the ESTHER Study findings.https://pmc.ncbi.nlm.nih.gov/articles/PMC9399360/

Arbitary cut off .....there is no longer an arbitary cut off of BHRT/HRT 10 years post menopausal or at 60 years.
BHRT/HRT is driven by individual needs and a good doctor's knowledge of the best way to prescribe...which is ...topical, non oral or vaginal.
The menopause societies' recommendations now are that : "CLEVELAND, Ohio (Sept 10, 2024)—The Menopause Society’s 2022 Hormone Therapy Position Statement advises that women aged older than 65 years can continue using hormone therapy (HT) with appropriate counseling and risk assessment. A new retrospective analysis demonstrates that it’s not unusual for women aged as old as 80 years to still benefit from HT. Results of the analysis will be presented at the 2024 Annual Meeting of The Menopause Society in Chicago September 10-14." https://menopause.org/press-releases/ongoing-individualized-hormone-therapy-appears-to-have-no-age-limit

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