Synthroid (levothyroxine) is a hormone-replacement drug that helps you to regulate metabolism and energy levels when the thyroid gland is not working properly or does not produce enough hormones. This medicine can be used to treat and prevent enlarged thyroid gland and hypothyroidism. Some medical conditions can affect the effectiveness of this medicine or cause dangerous side effects. These include a history of heart attack, anemia, diabetes, pituitary or adrenal glands problem, history of blood clots, heart disease, and coronary artery disease. Your dose of Synthroid will need to be adjusted if you are taking insulin or diabetes medicine. Any other medicines you are taking, including prescription and over-the-counter kinds, as well as mineral supplements, vitamins and herbal preparations are to be reported to your heath care provider to prevent dangerous drug interactions from occurring.

Synthroid is FDA pregnancy category A – it is absolutely safe for pregnant and breastfeeding women. Although Synthroid does pass into breast milk it has not been reported to affect the health of a nursing infant. The most common side effect of this medicine is mild hair loss. You need to discuss with your doctor potential risks when taking this medicine for a long time – for instance, bone loss that can lead to osteoporosis.