← Return to Is Anyone Else Tracking Your P1NP to CTX Ratio, While Taking Tymlos?

Discussion
Comment receiving replies
Profile picture for lp30 @lp30

@drsuefowler I am confused. Is the first number the ratio? If Tymlos had you all the way to 310 after 10 months why did you stop and switch to Forteo?

Jump to this post


Replies to "@drsuefowler I am confused. Is the first number the ratio? If Tymlos had you all the..."

@lp30, I started to see a new endocrinologist who preferred Forteo. I was only on a half dose of Tymlos due to side effects. I was unable to tolerate more because of dizziness and nausea. I had also had too much calcium in my urine with Tymlos. I had fewer side effects with Forteo, but I didn't like the fatigue and brain fog. Of course, I had to take a full dose of Forteo, which the endocrinologist liked since that was what was studied.

The ratio was 310/1440 after 6 months of a half dose of Tymlos. The 1440 is divided by 1000 so the ratio is 219. This is considerably better than 150 so is a very good result.

I just received bone marker results back. I stopped Tymlos after 2 years of a half dose, was off it for 2 months, then went back on it for a month at my endocrinologist's request. I increased my estrogen from 14 mcg to 25 mcg 2 months ago. My P1NP is now only 37 and my CTX is 171. 37/.171=216 which is still a good ratio. I think the Tymlos may not be doing anything anymore since my P1NP is basically the same as it was 3 months ago when I was not on it. I think the CTX has dropped in response to the increase in estrogen.

I also got my DEXA results back and they have improved since a year ago:

Lumbar Spine: TBS 1.377, T-score -1.1, Z-score 1.1

Left Femoral Neck: T-score -1.4, Z-score 0.5

Right Femoral Neck: T-score-1.8, Z-score 0.2

Left Total Hip: T-score -1.2, Z-score 0.6

Right Total Hip: T-score -1.5, Z-score 0.3

"Since May 16, 2025, there has been a 1/9% increase in the bone mineral density of the lumbar spine, a 9.3% increase in the BMD of the left total hip, and a 10.8% increase in the bone mineral density of the right total hip. I am very pleased with the results. I would like to just stay on estrogen, but my endocrinologist wants me to continue Tymlos. I will see another endocrinologist next week to hear her opinion.