Clenbuterol T3 Cytomel Stack, Cycle, Dosage, Side Effects & Results

Photo of author
Written By Jonathan Deventer

Clenbuterol T3 Cytomel Stack


What is a Clenbuterol T3 Cytomel stack and what are the benefits of this mixture for Fat loss? It’s a combination of:

Clenbuterol – a sympathomimetic amine that belongs to the drug class of bronchodilators

T3 – a thyroid hormone (triiodothyronine). One popular brand name of synthetic T3 is Cytomel.

Why would a bodybuilder want to combine a sympathomimetic amine bronchodilator and a thyroid hormone for athletic performance enhancement or muscle building endeavors?

Before creating a Clenbuterol T3 Cytomel stack, you should know what each of the drugs does on its own and why bodybuilders and athletes use it in a stack or combination typically employed in cutting or bulking cycles. Click here to visit our recommended supplier.

Clen And T3 Cycle

Clenbuterol T3 Cytomel

Clenbuterol, as a sympathomimetic amine, influences a number of functions of the sympathetic or autonomic nervous system.

A number of processes involved in such behaviors include:

  • heart rate
  • digestion
  • respiratory rate
  • metabolism
  • some organ activities including liver function

Clenbuterol’s main mechanism of action is its ability to dilate or widen the smooth lining of vessels inside the lungs.

These vessels (singular: bronchus/plural: bronchi) enable oxygen to reach smaller airway passages and the alveoli (air sacs) in the lungs to oxygenate blood before it’s pumped throughout the body.

All cells in the human body require oxygen for life. Optimal oxygen intake is essential for:

  • Growth (including muscle cells)
  • Stamina
  • Endurance

Increasing oxygen flow is perceived by bodybuilders to improve their efforts, not only in regard to performance but in regard to potential muscle growth.

Clenbuterol is also involved in part in the creation of energy and metabolism – and therefore thermogenesis or fat burning.

It is perceived as an effective weight-loss drug. Even so, other specific prescription weight-loss drugs may work more efficiently in this regard than Clenbuterol.

Most bodybuilders are aware that Clenbuterol doesn’t provide significant results in weight loss or muscle building, but anything that helps, right?

T3 is involved in thyroid hormone functions. It is converted from T4 (thyroxine).

Both are hormones produced by the thyroid and must be carefully balanced. These hormones regulate cellular metabolism and other autonomic body functions.

Synthetic T3 has a relatively short life span as compared to T4. Cytomel is a synthetic form of T3.

Higher than normal levels of T3 in the body can cause a number of unexpected and rather unpleasant symptoms that include:

  • difficulty sleeping/insomnia
  • increased anxiety
  • tachycardia (rapid heart rate)

According to the American Thyroid Association, higher than normal levels of T3 can have a detrimental impact on cardiovascular health as well as bones.

When it comes to taking any kind of hormone such as T3, it’s important to be aware that exogenous or outside of the body forms of hormones can disrupt the ability of the body’s hormones to manufacture and secrete hormones on their own.

In the case of T3 synthetic (Cytomel) supplementation, the ability of the body to convert T4 into T3 is often interrupted.

Clenbuterol T3 Cytomel Dosage


When attempting to create a Clenbuterol T3 Cytomel stack, it’s important to be aware of the dosages and dosage recommendations provided on bodybuilding websites.

Both Clenbuterol and Cytomel T3 require a prescription.

Dosage recommendations for use either in medical scenarios are vastly different than those recommended by bodybuilders.

For example, when recommended, the dosage for Cytomel (tablet form) for the treatment of mild hypothyroidism may start out at 25 mcg a day. A maintenance dose may range between 25 mcg a day and 75 mcg a day.

Bodybuilders typically start out at 20 to 25 mcg Cytomel a day, gradually increasing up to 80 mcg or 100 mcg a week. Dosages for a Clenbuterol T3 Cytomel stack may be even higher, depending on desired results.

The average recommended dosage of Clenbuterol in the treatment of asthma is approximately 20 mcg a day but may increase up to 40 depending on the situation and treatment goals.

When it comes to Clenbuterol, bodybuilding websites often recommend as much as 120 mcg a day for men and approximately 60 mcg to 80 mcg for women.

Start off slow and at the lowest dosage possible for results. Watch for side effects.


Clenbuterol T3 Cytomel Side Effects

Clenbuterol T3 Cytomel Side Effects

Side effects associated with Clenbuterol and T3 (Cytomel brand) separately can be rather alarming. Combining drugs in a Clenbuterol T3 Cytomel stack can produce unexpected and often undesired results.

The most common side effects associated with overuse of Clenbuterol include:

  • heart palpitations
  • increased anxiety
  • jitteriness or trembling of the hands
  • tachycardia (accelerated heart rate)

T3 (Cytomel) also comes with its own side effects such as:

  • diarrhea
  • increased appetite
  • tremors
  • tachycardia
  • heart palpitations
  • menstrual irregularity
  • irritability
  • hypertension
  • excessive sweating

Both Clenbuterol and T3 Cytomel stack combinations can have a detrimental impact on body functions. These two prescription strength drugs may also be contraindicated in the presence of other over-the-counter or prescribed medicines.

Before creating a Clenbuterol T3 Cytomel stack, take the time to research benefits and weigh them against the potential for side effects.



  1. Grimmer NM. Rhabdomyolysis Secondary to Clenbuterol Use and Exercise. J Emerg Med. 2016 Feb.
  2. Kang J. A Rapid Colorimetric Sensor of Clenbuterol Based on Cysteamine-Modified Gold Nanoparticles. ACS Appl Mater Interfaces. 2016 Jan 13.
  3. Nicoli R. Quantification of clenbuterol at trace level in human urine by ultra-high pressure liquid chromatography-tandem mass spectrometry. J Chromatogr A. 2013 May 31.
  4. Thevis M. Does the analysis of the enantiomeric composition of clenbuterol in human urine enable the differentiation of illicit clenbuterol administration from food contamination in sports drug testing?”Rapid Commun Mass Spectrom. 2013 Feb 28.
  5. Kamalakkannan G. Clenbuterol increases lean muscle mass but not endurance in patients with chronic heart failure. J Heart Lung Transplant. 2008 Apr.
  6. Vulić A. Accumulation of β-agonists clenbuterol and salbutamol in black and white mouse hair. J Anal Toxicol. 2011 Oct.

Leave a Comment