How to Recognize Synthroid Side Effects

Synthroid can have several side effects just like levothyroxine products. It is caused by either under-replacement i.e. too less levothyroxine or over-replacement i.e. too much of the active ingredient levothyroxine. In case you are getting less levothyroxine, you will suffer from hypothyroidism symptoms. On the other hand if you are getting too much of levothyroxine, you will endure hyperthyroidism symptoms. Thus, it is very important for you to recognise these Synthroid side effects. You are required to consult a doctor when you experience these symptoms. You can also get a treatment tracker by which you can note down when you suffer the symptoms and when they reoccur or don’t.


  • 1

    Preliminary caution

    Doctors usually check patients' medical history to see whether they have some sort of condition or not. They usually check whether the patient has blood pressure, diabetes, heart disease or any glandular problems which are related to adrenaline or pituitary glands. Remember that these glands release hormones which regulate blood pressure, metabolism and inflammatory reactions.

  • 2

    Adjustment period

    People face difficulty with adjusting to this drug in the beginning. The dose varies with every individual. In order to find the right amount of this drug to consume, people face problems initially. During the adjustment period, you will see many symptoms. Over-stimulation is one of the major symptoms which occur by itself along with nervousness, cramps, fever, irregular heartbeat, sleeplessness, vomiting, emotional instability or even diarrhea.

  • 3

    Weight changes

    One of the most common long-term side effects of Synthroid is change in weight. People either gain or lose weight. Weight gain is usually counter-intuitive as Synthroid speeds up metabolism or replaces services of non-functioning thyroid.

  • 4

    Excess of Synthroid

    Consuming too much of Synthroid leads to life-threatening side effects such as too much sweating, confusion, irregular heartbeat, extreme nervousness, seizure and chest pain. It is strongly advisable for you to consult a doctor if you think you have consumed too much.

  • 5

    Food and other drug interactions

    In case the patient consumes antacids, cholesterol drugs, cancer treatments, blood-thinners or even tranquilizers, he/she should inform the doctor before consuming Synthroid. This is because the drug's effectiveness is affected when other drugs enter the equation.

  • 6

    Age-related symptoms

    Synthroid use in older or postmenopausal women can lead to loss of bone density or increasingly brittle bones. In case children consume too much Synthroid, there growth might be affected. In addition to this, high dosage of this drug can cause sutures in their skull.

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