Precautions

Drug information provided by: IBM Micromedex

It is very important that your doctor check your progress at regular visits to allow your doctor to see if the medicine is working properly and to decide if you should continue to take it. Blood tests will be needed to check for unwanted effects.

This medicine may increase your risk of heart rhythm problems or heart attack. Check with your doctor right away if you have dizziness, fainting, fast, slow, or irregular heartbeat, chest pain or discomfort, or pain or discomfort in the arms, jaw, back, or neck.

This medicine may cause new or worsening heart failure. Check with your doctor right away if you have more than one of these symptoms: chest pain, decreased urine output, dilated neck veins, extreme fatigue, irregular breathing, irregular heartbeat, swelling of the face, fingers, feet, or lower legs, tightness in the chest, trouble breathing, or weight gain.

Levothyroxine should not be used for the treatment of obesity or for the purpose of losing weight. This medicine is ineffective for weight reduction and when taken in larger amounts may cause more serious medical conditions.

Make sure any doctor or dentist who treats you knows that you are using this medicine. This medicine may affect the results of certain medical tests.

Do not take other medicines unless they have been discussed with your doctor. This includes prescription or nonprescription (over-the-counter [OTC]) medicines and herbal or vitamin supplements.