Your Synthroid dosage is determined by your doctor based on your individual needs and thyroid function tests. Don’t adjust your dose without consulting them. Typical starting doses range from 25 to 100 mcg daily, adjusted gradually based on blood tests monitoring your TSH (thyroid-stimulating hormone) levels.
Common Side Effects
While Synthroid is generally safe and effective, some people experience side effects. These usually improve with dosage adjustment or may disappear over time.
- Headache: A common initial side effect, often resolving as your body adjusts. Changes in Heart Rate: Can include palpitations or increased heart rate. Report these immediately. Weight changes: Both weight gain and weight loss are possible, dependent on dosage and individual metabolism. Muscle weakness or cramps: These are less frequent but should be reported to your doctor. Tremors: Usually mild and can be managed with dosage adjustment. Sleep disturbances: Some users report difficulty sleeping or changes in sleep patterns. Digestive issues: Constipation or diarrhea may occur. Increase water intake and fiber may help.
Less Common, but Serious Side Effects
Rarely, more serious side effects can occur. Seek immediate medical attention if you experience:
Severe chest pain Shortness of breath Severe allergic reactions (rash, hives, swelling) Seizures
Regular blood tests are crucial for monitoring your TSH levels and adjusting your dosage accordingly. Maintain open communication with your doctor regarding any side effects or concerns you have.
