General
Liothyronine (Cytomel)
Virtual visit

Liothyronine (Cytomel)

With our quick and easy online prescription process, you can manage your health effortlessly — whether you need a first-time prescription for Liothyronine (Cytomel) or a refill of an existing one.

Licensed providers in all 50 states

Expert-guided, evidence-based treatments

Skip the trip to the doctor's office

Visit options

Costs shown are for the visit only. You'll pay for medication at your preferred pharmacy.

Video Visit

$25

Est. or $100 w/o insurance

Chat Visit

$30

w/o insurance

Most insurance accepted

Board-certified

No hidden fees

Available nationwide

What is Liothyronine (Cytomel)?

Liothyronine is a synthetic form of T3, the active thyroid hormone your body uses directly at the cellular level. While most thyroid medications contain T4 (which the body must convert to T3), Liothyronine delivers T3 directly—making it useful for patients whose bodies don't convert T4 efficiently, or who still have symptoms on T4-only therapy. It's prescribed alone or alongside levothyroxine to optimize thyroid hormone levels. Because T3 acts faster and clears more quickly than T4, it may require twice-daily dosing.

Direct T3 delivery

Provides the active form of thyroid hormone that cells actually use, bypassing the conversion step that some patients perform inefficiently—leading to more immediate and complete hormonal effect.

Addresses conversion issues

Some patients have genetic or physiological limitations in converting T4 to T3. Liothyronine fills that gap directly, helping resolve persistent symptoms like fatigue and brain fog.

Combination therapy support

Often added to levothyroxine for patients who remain symptomatic on T4 alone, offering a more complete thyroid hormone replacement that mirrors what a healthy thyroid naturally produces.

Virtual visit with clinician

Ongoing support, always available.

You’ll be supported by experienced clinicians who care for a wide range of health needs, from everyday concerns to more complex conditions.

Our clinicians track your progress over time and adjust your care as needed. If medication is prescribed, we’ll manage dosing and monitor for side effects. If lab testing is recommended, we review results and refine your plan accordingly. You’re never left to navigate care on your own.

All your care in one place. That’s the General Medicine difference.

We help you understand your options, connect you to the right clinicians, manage prescriptions, coordinate any needed evaluations, and keep an eye on your overall health along the way. It’s comprehensive care that looks at the full picture — your goals, your history, your lifestyle — and makes it simple to move forward with confidence.

Your care plan
Clinician

What our customers have to say

“I feel like I’m finally on the right path to improving my health with the right support now! It’s so refreshing and reassuring.”

Emerald

“My experience with General Medicine was amazing. The understanding and care that was taken to figure out what is exactly going on with me. I feel like a weight has been lifted off of me.”

Kaylee

“I couldn’t be happier with my experience with General Medicine! They are fast, responsive, kind and knowledgeable. It is much easier, more affordable and faster.”

Nika

Get the care you need, without the wait.

Frequently Asked Questions

Why would I need T3 if I'm already taking levothyroxine?

Some people don't convert T4 to active T3 efficiently — due to genetics, gut issues, or other factors. Adding T3 directly can resolve persistent symptoms like fatigue and brain fog that T4 alone doesn't address.

How quickly does liothyronine work?

T3 acts faster than T4 — many people notice effects within days. Because it clears the body quickly, consistent twice-daily dosing is important to maintain stable levels throughout the day.

Is it safe to take T3 and T4 together?

Yes, for appropriate patients. Many clinicians combine liothyronine with levothyroxine to provide a more complete thyroid hormone profile. Blood levels are monitored regularly to prevent over-replacement.

What side effects might I experience?

Side effects typically indicate too much thyroid hormone — rapid or irregular heartbeat, anxiety, sweating, insomnia, and unintended weight loss. These signal that the dose may need to be adjusted downward.

How does dosing work for liothyronine?

Doses are much smaller than levothyroxine — typically 5–25 mcg per day, often split into two doses. Starting low and increasing gradually is essential given how potent and fast-acting T3 is.
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