Synthroid

Levothyroxine exhibits all the actions of endogenous thyroid hormone. Liothyronine (T3) is the principal hormone that exhibits these actions whereas levothyroxine (T4) is the major hormone secreted by the thyroid gland and is metabolically deiodinated to T3 in peripheral tissues. Serum concentrations of T4 and TSH are typically used as the primary monitoring parameters for determining thyroid function.

Your health care provider needs to know if you have any of these conditions: angina; blood clotting problems; diabetes; dieting or on a weight loss program; fertility problems; heart disease; high levels of thyroid hormone; pituitary gland problem; previous heart attack; an unusual or allergic reaction to levothyroxine, thyroid hormones, other medicines, foods, dyes, or preservatives; pregnant or trying to get pregnant; breast-feeding.

Please discuss with your healthcare provider.

Some possible side effects include: changes in appetite; changes in menstrual periods; diarrhea; hair loss; headache; trouble sleeping; weight loss. This list may not describe all possible side effects. Call your doctor for medical advice about side effects.

Store this medication at 68°F to 77°F (20°C to 25°C) and away from heat, moisture and light. Keep all medicine out of the reach of children. Throw away any unused medicine after the beyond use date. Do not flush unused medications or pour down a sink or drain.