Liothyronine Sodium (T3) and Thyroid Medications
Handelnamen: T3, T4, Tertroxine, Eltroxin
Chemische namen: Liothyronine Natrium & Thyroxine Natrium
Routes: oral
Liothyronine Sodium (T3)
Eltroxin (Thyroxine Sodium or T4):
Action: Very slow-acting.
Plasma Half-life: Approximately 11 days.
Effect Timeline: Effects manifest roughly two weeks after dosing.
Steady State: Takes about 4 weeks to reach stable blood levels.
Thyroid Suppression: Strong suppression, lasting 4-6 weeks after discontinuation.
Absorption: Poor, with less than 80% bioavailability.
Tertroxin (Liothyronine Sodium or T3):
Action: Works quickly and effectively.
Plasma Half-life: About 12 hours.
Effect Timeline: Starts working immediately.
Thyroid Suppression: Minimal; effects diminish quickly after stopping.
Side Effects
Headaches
Irritability
Nervousness
Sweating
Irregular heartbeat
Increased bowel motility
Menstrual irregularities
Overdose Risks
Heart Rate:
Can exceed 150 beats per minute.
Tertroxin (T3) Overdose:
Clears from the body in about one day.
Symptoms usually disappear quickly.
Eltroxin (T4) Overdose:
Symptoms may last weeks.
Risks include heart failure and permanent heart damage.
Dosing Guidelines
Individual Variability:
Typical range: 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 gradually allow the body to adjust to rising hormone levels and minimize side effects.
Cycle and Discontinuation
Duration:
Usually no longer than 6 weeks.
Discontinuation:
Should be gradual, reducing dose by 10 mcg every 3-4 days.
Reason:
To give the body time to readjust its endogenous hormone production.
Additional Considerations
Stacking Drugs:
Combining Ephedrine, Tertroxin, and Clenbuterol increases resting heart rate.
Heart rate reserve and aerobic capacity decrease.
It becomes difficult to train at very high aerobic intensities.
Training Advice:
Reduce training intensity and increase duration to prevent overexertion.
Tags: T3 HILMA Biocare