Levothyroxine

How Hard Is It to Find Levothyroxine in Stock?

As of 2026, generic levothyroxine oral tablets are not on the FDA's official national drug shortage list. Common strengths (25–125 mcg) are broadly available at most pharmacies. However, less common strengths — particularly 137 mcg, 175 mcg, 200 mcg, and 300 mcg — are intermittently out of stock at chain pharmacies. Brand-name Levoxyl has low market share and is often not routinely stocked at chain pharmacies.

Past supply disruptions have been significant: a 2013 Levoxyl recall lasted nearly a year; Hurricane Maria in 2017 caused a national shortage; and in March 2025, Kaiser Permanente restricted generic levothyroxine dispensing to 30-day supplies due to a manufacturer supply reduction. Levothyroxine is prone to shortages because of its narrow therapeutic index, concentrated manufacturing geography, and complex brand-switching protocols that make flexibility difficult.

If you're having trouble finding your levothyroxine strength, medfinder calls pharmacies near you to find which ones have your specific strength in stock — saving you hours of phone calls.

Who Can Prescribe Levothyroxine?

Levothyroxine is not a controlled substance and does not require any special DEA licensing to prescribe. Any licensed prescriber in the United States can prescribe levothyroxine, including those operating via telehealth. Most hypothyroidism is managed by primary care physicians rather than specialists.

Endocrinologists — specialists in thyroid and hormone disorders; manage complex cases, thyroid cancer, and difficult-to-stabilize patients

Primary care physicians (PCPs) — family medicine and internal medicine physicians who manage the vast majority of hypothyroidism diagnoses and ongoing levothyroxine prescribing

OB/GYN physicians — often diagnose and manage hypothyroidism during pregnancy as part of prenatal care

Pediatricians and pediatric endocrinologists — for congenital hypothyroidism and children with acquired hypothyroidism

Nurse practitioners (NPs) — can independently prescribe in most states; commonly manage routine hypothyroidism in primary care settings

Physician assistants (PAs) — can prescribe levothyroxine under physician supervision in most states

Levothyroxine is widely available via telehealth. Platforms such as Teladoc, MDLive, Sesame, and Hims & Hers Health can evaluate patients for hypothyroidism and prescribe levothyroxine, provided the patient has recent TSH lab results or the platform orders labs before prescribing. No special restrictions apply to telehealth prescribing of levothyroxine.

Is Levothyroxine a Controlled Substance?

No. Levothyroxine is not a DEA-controlled substance and is not assigned a DEA schedule (I through V). It has no abuse potential or dependence liability. Any licensed prescriber — including primary care physicians, nurse practitioners, and physician assistants — can prescribe levothyroxine without special DEA authorization.

Because it is not a controlled substance, levothyroxine can be freely prescribed via telehealth platforms without additional regulatory restrictions. Refills can be provided in 90-day supplies, and prescriptions can be called in, faxed, or sent electronically. However, because levothyroxine is a narrow therapeutic index drug, most prescribers recommend annual or semiannual monitoring and regular follow-up to adjust the dose as needed.

Common Side Effects of Levothyroxine

When taken at the correct dose, most patients experience few or no side effects. Side effects primarily occur when the dose is too high (mimicking hyperthyroidism):

Heart palpitations or rapid heartbeat

Nervousness, irritability, anxiety

Insomnia and sleep disturbance

Tremors, sweating, heat intolerance

Weight loss and increased appetite

Diarrhea and more frequent bowel movements

Headache and muscle weakness

Temporary hair loss (usually resolves within 3-6 months)

Serious Side Effects of Levothyroxine

Cardiac arrhythmias and angina (excessive dosing, especially in cardiac patients)

Decreased bone mineral density with long-term TSH suppression

Seizures (rare, may occur at therapy initiation)

Adrenal crisis in patients with undiagnosed adrenal insufficiency

Boxed Warning: Levothyroxine should not be used for weight loss or obesity treatment. Doses beyond normal physiologic requirements can cause serious or life-threatening toxicity.

Final Thoughts on Levothyroxine

Levothyroxine is a safe, effective, and affordable treatment for hypothyroidism when taken correctly and monitored with regular TSH testing. Generic levothyroxine is one of the least expensive medications available — as little as $4 per month at Walmart — making it accessible to virtually all patients. For brand-name users, AbbVie's Synthroid savings programs significantly reduce out-of-pocket costs.

Pharmacy availability is the most common challenge levothyroxine patients face. Less common strengths and brand-name products like Levoxyl can be difficult to find at chain pharmacies. Patients benefit from knowing their backup options: independent pharmacies, warehouse stores, and mail-order services often have better access to specific products.

If you're struggling to find your levothyroxine in stock at your local pharmacy, medfinder is here to help. medfinder calls pharmacies near you and reports back which ones have your specific strength in stock — so you don't have to spend your time on hold.