Every morning, same time, same routine. You shake out the little pill, set it on your palm, and swallow it before coffee, before breakfast, maybe before you’ve even fully woken up. You’ve done it so many times that skipping it would feel wrong. For millions of Americans over 60, that pill is levothyroxine, one of the top three most prescribed medications in the United States and the United Kingdom. And for most of the years you’ve been taking it, probably nobody has ever asked the one question that actually matters: do you still need it?
That question now has a research-backed answer worth knowing. A study published in April 2026 in JAMA found that about one in four adults aged 60 and older were able to stop taking levothyroxine and maintain healthy thyroid function for a full year afterward. No worsening symptoms. No meaningful decline in quality of life. This article explains what that research found, what it means for you specifically, and exactly what steps to take if you want to explore whether your name belongs in that one-in-four group.
What the Thyroid Does and When It Stops Keeping Up
A Small Gland With a Big Job
Your thyroid is a small, butterfly-shaped gland sitting at the base of your neck, just below your Adam’s apple. It produces a hormone that sets the pace for nearly everything your body does: your energy level, weight, body temperature, digestion, and heart rate. When it works well, you never notice it. When it doesn’t, you feel it everywhere.
When the Thyroid Falls Short
Hypothyroidism means the thyroid doesn’t produce enough of that hormone. It’s more common in women and becomes more common in adults over 60, and it tends to creep in slowly, which makes it easy to miss or to write off as “just getting older.” Here is what it can actually feel like for the person living through it:
You sleep eight hours and still feel like you’re moving through wet sand by mid-morning.
You gain weight without changing what you eat, and nothing you try shifts it.
Cold rooms feel unbearable, even when everyone around you is perfectly comfortable.
Your thinking slows down, like a computer loading a page that refuses to fully open, and you notice it happening more and more.
A simple blood test measuring your TSH (thyroid-stimulating hormone) can confirm whether your thyroid is underperforming. TSH is produced by your brain, not your thyroid. When it rises, it’s your brain’s signal that the thyroid isn’t keeping up. That elevated number is usually the point at which levothyroxine enters the picture.
Levothyroxine: The Pill That Fills In the Gap
Levothyroxine is a synthetic version of the hormone your thyroid should be producing on its own. It’s effective, affordable, and has been in use for decades. It is most frequently prescribed to adults aged 50 to 70, and in the United States alone, prescriptions for it more than doubled between 2004 and 2019.
Most people start on it for one of two reasons. The first is overt hypothyroidism, where the thyroid has clearly and significantly failed. The second is subclinical hypothyroidism, and this is where the picture gets more complicated. Subclinical hypothyroidism means your TSH level is elevated, but your actual thyroid hormone level is still within the normal range. Your brain is signaling loudly, but your thyroid is still responding, at least partially. You may feel slightly off. You may feel fine. Most of the time, the diagnosis comes from routine bloodwork, not from a complaint you brought in.
Research now shows that large, well-designed clinical trials have found that treating subclinical hypothyroidism with levothyroxine in older adults does not reliably improve symptoms, quality of life, depression, or mental sharpness. The drug doesn’t appear to deliver the expected benefit for this particular group. That finding has been building in the medical literature for years, and the 2026 JAMA study is now one of its most direct outcomes.
What a Major New Study Found
About one in four adults over 60 stopped taking levothyroxine and were still doing fine a full year later. A prospective study published in April 2026 in JAMA followed 370 real people through a supervised tapering process and checked in on them at the one-year mark.
Here is what the data showed:
370 adults aged 60 and older enrolled, all on stable levothyroxine doses, all tapering gradually under close medical supervision
At the one-year mark, 25.7% had successfully discontinued levothyroxine while maintaining normal thyroid function without any medication
Among those taking 50 micrograms per day or less, the success rate climbed to nearly 64%, meaning almost two out of three people on low doses no longer needed the drug
Thyroid-related quality of life showed no meaningful decline among those who stopped successfully
That last point is the one most people worry about. The fear that stopping a long-term medication will make you feel worse is real, valid, and worth taking seriously. For the majority of participants in this study who stopped successfully, it didn’t happen.
Being honest about the full picture: roughly three out of four participants did need to return to levothyroxine. Not because something went wrong, but because their thyroid levels indicated they still genuinely needed support. This is not a story about everyone stopping their medication. It is a story about knowing whether to ask the question.
The Risk of Staying on a Medication You May Not Need
Something that doesn’t come up often enough in routine appointments: when levothyroxine pushes your TSH too low, which has been documented in about 41% of older levothyroxine users, it can cause direct harm. Increased risk of bone fractures. Increased risk of atrial fibrillation, an irregular heartbeat that can lead to stroke. Fragile bones and a heart that flutters when it should beat steadily are not abstract concerns. Staying on a medication you no longer need isn’t the automatically safer path.
Could You Be a Candidate?
This section is information, not a clinical recommendation. Your healthcare provider makes the actual call. But understanding the research criteria can help you walk into the next appointment prepared.
Signs You May Be Worth Discussing This With Your Doctor
The clinical research identifies a specific group as reasonable candidates for a deprescribing conversation:
You are 60 years of age or older
You have been on the same stable dose of levothyroxine for at least one year
Your most recent TSH level, checked while taking levothyroxine, was below 10 mIU/L
You are on a lower dose, especially 50 micrograms per day or less, which is the group that saw the highest success rates in the JAMA trial
If most of those apply to you, you have a good reason to raise the question at your next appointment.
When This Conversation Probably Isn’t the Right One
Some people need levothyroxine permanently, and stopping would cause real harm. The research is specific about when deprescribing isn’t appropriate:
Your thyroid was surgically removed, or you received radioactive iodine treatment or radiation to your neck
You were born with hypothyroidism, meaning your thyroid never functioned on its own
You use a medication that significantly affects thyroid function, such as amiodarone or lithium
Your most recent TSH was 10 mIU/L or higher, even while taking levothyroxine
Only your healthcare provider can confirm whether this applies to you.
What Stopping Levothyroxine Actually Looks Like
Be clear on one point before anything else. You do not just stop one day. This is not a decision made on a Tuesday and acted on by Wednesday. Discontinuing levothyroxine is a slow, carefully monitored process, and every single step is guided by your lab results, not by how you feel on any given morning.
The clinical trial protocol reduced doses by approximately 25 micrograms every six weeks, with TSH and free T4 checked at each visit before any further reduction. The full tapering process takes several months, depending on your starting dose. If your thyroid levels begin to fall outside the safe range at any point during that process, the reduction stops. Your provider adjusts the plan, and you two re-evaluate.
Your doctor watches your numbers the whole way through. Participants in the 2026 JAMA study were followed for a full year after beginning to taper, which means this process is longitudinal and deliberate, not a quick experiment.
What to Watch For During and After Tapering
Knowing when to call and when to log and wait can make this process far less stressful. Not every new sensation during a medication change means something is wrong, and not everything should wait until your next scheduled visit.
Call Your Provider Right Away If You Notice These
These are not symptoms to write down for a future appointment.
Your heart starts skipping beats, racing, or fluttering, even when you’re sitting still and at rest
You feel so cold you cannot get warm, even in a heated room, and it is new or dramatically worse than it has been
You gain more than five pounds in two weeks with no change in eating or activity
Your thinking becomes noticeably foggy or slowed in a way that is clearly new and not just an off day
Don’t log these. Call.
Keep a Log and Bring It to Your Next Visit
These symptoms are worth tracking, but they aren’t emergencies. They tell your provider that your body is still adjusting and that the full picture needs attention at your next visit.
Mild fatigue that is new but manageable and not worsening day over day
Constipation that is bothersome but not severe or accompanied by pain
Mild dry skin or some additional hair thinning that you notice gradually
Feeling slightly more sensitive to cold than usual, but not dramatically so
Write down the date, what you noticed, and how long it lasted. Brief and accurate is exactly what your provider needs.
A Note for Healthcare Providers
If you care for older adults on levothyroxine, the 2026 JAMA evidence provides solid grounds to start a conversation that many providers have been reluctant to initiate. Recent evidence supports deprescribing low-dose levothyroxine in older adults who lack a clear, ongoing, documented indication for treatment.
Start with the original reason for the prescription. Is it documented? Was the hypothyroidism transient, such as a postpartum period or an acute systemic illness? Has this patient been on the same low dose for years without any formal re-evaluation of ongoing need? Guidelines have historically not addressed the re-evaluation of levothyroxine indications, which has contributed to years of automatic refills for patients who may no longer need them.
If your patient is 60 or older, on a stable dose with a TSH below 10 mIU/L and no contraindications such as thyroidectomy, prior radioactive iodine treatment, or concurrent amiodarone use, the research supports raising the question. Thyroid-related quality of life did not worsen in those who successfully discontinued in the JAMA trial. The documented risks of oversuppression in older adults, including bone loss and atrial fibrillation, should be included in that clinical calculation. Most of your patients will not bring this up themselves. They have been taking this pill for years, often without anyone asking whether they still need it. The conversation starts with you.
Time to Have the Conversation
If you’re a patient over 60:
You may have been taking this medication for a decade. Maybe two. Perhaps nobody has ever asked whether you still need it, and that’s not uncommon in primary care. It’s not too late to ask now. A clear, direct question for your next appointment: “I’m over 60, and I’ve been on levothyroxine for a while. Is there any chance I don’t still need it?” Your provider can look at your dose, your most recent TSH, and your prescribing history to give you a real, individualized answer. Some people will clearly still need the medication. Others, and it may be you, may not. Either way, you deserve to know.
If you’re a healthcare provider:
The evidence is recent and credible. Your older patients on low-dose levothyroxine, particularly those on 50 micrograms per day or less with a stable TSH below 10 mIU/L and no contraindications, are candidates for this conversation. Most of them will not start it. They trust you. That trust is exactly the reason the conversation belongs with you.
Free Daily Symptom Tracker: Each headache, flare, or fatigue spike reveals a clue. This two-page Daily Symptom Tracker records sleep quality, food intake, triggers, severity, and effective relief methods—all in one place. Use it daily for 31 days and share the pages with your healthcare provider or health navigation expert. Together, you can move from guessing to addressing the root cause. Instructions on how to use the free daily symptom tracker and the free daily symptom tracker.
This site uses Amazon Associate links, which means I earn a small commission when you purchase books or products through these links—at no extra cost to you. These earnings help me keep this website running and ad-free, so I can continue providing helpful articles and resources at no charge.
If you don’t see anything you need today but still want to support this work, you can buy me a cup of coffee or tea. Every bit of support helps me continue writing and sharing resources for families during difficult times.
