Zionova Cytomel

Overview

Liothyronine is the active thyroid hormone T3. Cytomel is prescribed in Canada for underactive thyroid, sometimes alongside levothyroxine.

This listing is Zionova Cytomel, photographed as we ship it and priced in Canadian dollars.

How it works

T3 binds thyroid receptors in nearly every cell, raising metabolic rate, heart rate and energy use. Outside T3 makes the thyroid produce less of its own hormone.

Clinical reference

Reference information from product labels and clinical literature only. It is not a recommendation or dosing advice for you; any use should be set and monitored by a doctor.

Combinations and interactions

• Raises the heart effects of clenbuterol, albuterol and stimulants.
• Interactions: changes the dose needed of warfarin, insulin and digoxin; calcium and iron reduce its absorption.

Risks and side effects

• Overactive-thyroid symptoms. Racing heart, sweating, tremor, anxiety and weight loss.
• Muscle loss. Excess thyroid hormone breaks down muscle as well as fat.
• Bone and heart. Long-term excess raises atrial fibrillation and bone loss risk.

Do not use it if you have heart disease, uncorrected adrenal insufficiency, an overactive thyroid, or are using it for weight loss with normal thyroid function.

Bloodwork to discuss with your doctor

• TSH, free T3 and free T4
• Heart rate
• Lipid panel

Chemistry

Liothyronine (T3)

Formula

C₁₅H₁₂I₃NO₄

Molecular weight

650.97 g/mol

CAS

6893-02-3

PubChem

CID 5920

Storage and handling

Keep the bottle tightly closed at room temperature, away from moisture, heat and children. Do not move tablets into unlabelled containers.

Canadian legal status

This is a prescription medicine in Canada. A doctor should assess whether it suits you, choose the dose and monitor you while you use it.

FAQ

What strength are the tablets?

Strength is printed on each bottle; Cytomel tablets are measured in micrograms.

How long does T3 last?

Its half-life is about one to two and a half days.

Is T3 a weight-loss drug?

No. Health Canada warns against using thyroid hormone for weight loss.

How fast will it reach me?

Orders leave Vancouver by Canada Post Xpresspost and the tracking number arrives within 72 hours of your e-Transfer. Most provinces receive parcels 1 to 6 business days after that; the territories can take up to 10. Xpresspost is free on orders over $300, and a lost or seized parcel is reshipped at no charge.