Right levothyroxine dose for older adults
Levothyroxine Dosing in Older Individuals
This project compares keeping thyroid hormone levels low-normal versus allowing slightly higher levels in adults aged 65 and older who take levothyroxine to find which approach keeps them healthier.
Quick facts
| Grant type | R01 grant |
|---|---|
| Study type | NIH-funded research |
| Funding institution | University of Pennsylvania NIH-funded |
| Lab location | 1 site (Philadelphia, United States) |
| Project ID | NIH-11305242 on NIH RePORTER |
What this research studies
If you are 65 or older and take levothyroxine, researchers will compare two common dosing approaches: keeping TSH in the lower end of the standard range versus allowing TSH just above the usual upper limit. Participants will have regular blood tests, medication adjustments, and monitoring of heart rhythm, blood pressure, symptoms, and other health measures. The study includes people who rely entirely on levothyroxine (no thyroid) as well as those with some remaining thyroid function. The goal is to identify dosing that reduces risks like abnormal heart rhythms and overtreatment while maintaining overall well-being.
Who could benefit from this research
Good fit: Adults aged 65 and older who are taking levothyroxine for hypothyroidism, including those without a functioning thyroid, are the ideal candidates.
Not a fit: People under 65, those not on levothyroxine, or patients with unstable acute illnesses are unlikely to benefit from participating.
Why it matters
Potential benefit: If successful, this work could help older adults avoid unnecessary high doses and lower risks such as atrial fibrillation and blood pressure problems.
How similar studies have performed: Large trials of treating subclinical hypothyroidism in older adults found no clear benefit and small studies in younger levothyroxine users show similar physiology, so this work fills a gap for older people fully dependent on replacement.
Where this research is happening
Philadelphia, United States
- University of Pennsylvania — Philadelphia, United States (Active)
Researchers
- Principal investigator: Cappola, Anne R — University of Pennsylvania
- Study coordinator: Cappola, Anne R
About this research
- This is an active NIH-funded research project — typically early-stage science, not a clinical trial accepting patient enrollment.
- Some NIH-funded labs run parallel clinical studies or seek volunteers for related work. To check, contact the principal investigator or institution listed above.
- For full project details, budget, and progress reports, visit the official NIH RePORTER page below.