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Mechanism of action of thyroid hormones: T3 and T4 are the main hormones regulating metabolism. The body is produced by the thyroid gland. For the production they need iodine. T4 is 10 times less potent than T3 and its main function is to synthesize in T3.

Name: Thyroxine
Trade names: T4, L- thyroxine
Category:  hormones
Type: oral
Action time: 24 hours
Optimal dosage:    50-100 mcg daily
Common side effects: increased sweating, increased body temperature