SYNTHROID (Levothyroxine) is a medication used to treat hypothyroidism. Hypothyroidism occurs when there is too little thyroid hormone in the body, which can cause a variety of symptoms that impact mood, weight, and body temperature.
The body may have too little thyroid for a number of reasons, including problems with the thyroid gland itself, problems with the pituitary gland — which send functional signals to the thyroid gland, differences in genetics (congenital), or acquisition with age.
SYNTHROID is a synthetic version of the thyroid hormone T4. The generic name is levothyroxine. SYNTHROID replaces T4 and is converted to active thyroid hormone, T3, in the body.
SYNTHROID dosages can range from 12.5 to 200 micrograms daily. Some people may require doses above this range.
SYNTHROID should be taken on an empty stomach, at least 30 minutes before a meal. Synthroid can be taken with water. Take SYNTHROID in the same manner each day, since food can timing can change how much is absorbed and impact the treatment.
The active ingredient in SYNTHROID is levothyroxine sodium.
Use SYNTHROID with caution in older adults with underlying cardiovascular disease.
SYNTHROID requires regular lab monitoring to be effective. Following recommendations from your doctor regarding dose changes and lab monitoring.
SYNTHROID and other replacement thyroid hormone medications may impact blood glucose control in diabetic patients.
Excess thyroid hormone can decrease bone mineral density, so the lowest effective dose should be used.
If you experience adverse reactions while taking SYNTHROID, it may be a sign that the dose is too high or too low. Speak with your doctor about any side effects. Common side effects of SYNTHROID medication include:
- Abdominal cramps
- Emotional lability
- Excessive sweating
- Hair loss
- Heart failure
- Heat intolerance
- Increased appetite
- Increased pulse and blood pressure
- Menstrual irregularities
- Weight loss