A 27-year-old female asked:
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how many weeks after beginning 25mcg of synthroid (thyroxine) can side effects occur?

1 doctor answer
Dr. Philip Kern
42 years experience Endocrinology
Thyroid treatment: 25 mcg of levothyroxine is a very low dose; a normal dose for hypothyroidism is typically much higher. The only side effect is taking too much (hyperthyroidism: palpitations, sweating, tremor, etc) or not taking enough (hypothyroid: fatigue, cold, etc). But such symptoms can be from other things. You need to get levels checked and talk to the doctor who initially prescribed this.
Answered on Jul 5, 2015
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