Liothyronine Sodium (T3)
Liothyronine sodium is the L-isomer of triiodothyronine (T3), a form of thyroid hormone used to treat hypothyroidism and myxedema coma. It is also popular among bodybuilders and athletes for its ability to increase metabolism and support fat breakdown.

Products Used 
Eltroxin (Thyroxine Sodium or T4):
 Action: Very slow-acting hormone.
 Plasma Half-life: Approximately 11 days.
 Onset of Effect: Takes nearly two weeks for effects to manifest.
 Time to Reach Steady Plasma Levels: About 4 weeks.
 Thyroid Suppression: Strongly suppresses natural thyroid function, with effects lasting 4-6 weeks after stopping.
 Absorption: Poor, with a bioavailability of less than 80%.

Tertroxin (Liothyronine Sodium or T3):
Action: Works quickly.
Plasma Half-life: Around 12 hours.
Onset of Effect: Immediate.
Thyroid Suppression: Minimal; effects do not last long after discontinuation.
Absorption: More than 95% of the dose is absorbed.

Side Effects
Headaches
Irritability
Nervousness
Sweating
Irregular heartbeat
Increased bowel motility
Menstrual irregularities

Overdose Risks
Heart Rate: Can exceed 150 beats per minute.
Tertroxin Overdose:
Cleared from the body in about one day.
Symptoms typically disappear quickly.

Eltroxin Overdose:
Symptoms may last weeks.
Risks include heart failure and permanent heart damage.

Dosing Guidelines
Individual Variability: Dosages vary among individuals, generally ranging from 20 to 100 mcg per day.
Starting Dose:Begin at 20 mcg.
Titration:Increase by 10 mcg every 3-4 days.
Purpose of Titration:To allow the body to adjust gradually to increasing thyroid hormone levels and minimize side effects.

Cycle and Discontinuation
Cycle Duration: Usually does not exceed 6 weeks.
Discontinuation:Should be gradual, reducing the dose by 10 mcg every 3-4 days.
Reason:To give the body time to readjust its endogenous hormone production.