Medications and Drugs

Hyperthyroidism Slideshow

GENERIC NAME: LEVOTHYROXINE - INJECTION (lev-oh-thigh-ROX in)

BRAND NAME(S): Levothroid, Synthroid

Medication Uses | How To Use | Side Effects | Precautions | Drug Interactions | Overdose | Notes | Missed Dose | Storage

USES: This drug is used to replace thyroid hormone, to treat an overactive thyroid and for testing thyroid gland function.

HOW TO USE: This medication is given by injection into a vein or into a muscle and is usually given once a day before breakfast. Do not stop using this medication without consulting with your doctor. Thyroid replacement therapy is usually taken for life. This drug must be mixed immediately before use. Do not mix drug with diluent for later use.

SIDE EFFECTS: Symptoms of low thyroid levels include fatigue, muscle aches, constipation, dry skin, weight gain, slow heart rate, sensitivity to cold or dry, brittle hair that tends to fall out easily. These symptoms should disappear as your body adjusts to the medication. If these symptoms persist or worsen, inform your doctor. Symptoms of high thyroid levels include headache, chest pain, fast/irregular heartbeat, shortness of breath, trembling, sweating, diarrhea or weight loss. If you experience any of these effects, the dose of your medication may need to be reduced. Consult your doctor. If you notice other effects not listed above, contact your doctor or pharmacist.

PRECAUTIONS: Tell your doctor your medical history before using this drug. Avoid using thyroid drugs for weight control. Caution is advised when using this drug in children because overuse may reduce the child's future adult height. Consult your doctor for more details. Current information shows that this drug may be used during pregnancy. Small amounts of this drug are excreted into breast milk. Consult your doctor before breast-feeding.