Levothyroxine is a thyroid medicine that replaces a hormone normally produced by your thyroid gland to regulate the body's energy and metabolism.
Levothyroxine is used to treat hypothyroidism (low thyroid hormone). This medicine is given when your thyroid does not produce enough of this hormone on its own.
Levothyroxine oral works best if you take it on an empty stomach, 30 to 60 minutes before breakfast.
Swallow the tablet or capsule whole, with a full glass of water. The tablet may dissolve very quickly and could swell in your throat.
If you use any of the following drugs, avoid taking them within 4 hours before or 4 hours after you take levothyroxine: