Levothyroxine – Injection, Levothroid, Synthroid

Warning: This medication should not be used for weight loss. Normal doses will not cause weight loss in people with normal thyroid function. Large doses may cause serious side effects, especially when taken with diet pills.

Uses: Levothyroxine is used to treat an underactive thyroid (hypothyroidism). It replaces the natural thyroid hormone that is normally produced by the thyroid gland. It is also used to treat other types of thyroid disorders and to test thyroid activity.

How to Use: This medication is given by injection into a vein or into a muscle as directed by your doctor, usually once a day. Dosage is based on your medical condition, thyroid hormone levels, and response to treatment. If you are giving this medication to yourself at home, learn all preparation and usage instructions from your healthcare professional. Use this medication immediately after mixing. Before using, visually check for particles or discoloration. If either is present, do not use the liquid. Learn how to store and discard medical supplies safely. Use this medication regularly to get the most benefit from it. To help you remember, use it at the same time each day. Do not stop using this medication without consulting with your doctor.

Symptoms of low thyroid levels include tiredness, muscle aches, constipation, dry skin, weight gain, slow heartbeat, or sensitivity to cold. These symptoms should improve in a few days as your body adjusts to this medication. Tell your doctor if your symptoms persist or worsen.

Side Effects: Some hair loss may occur during the first few months of starting this drug. This effect is usually temporary. Tell your doctor or pharmacist if this effect persists or worsens. Serious side effects may occur if there is too much thyroid hormone. Tell your doctor immediately if you experience any signs of too much thyroid hormone. Get medical help right away if you experience chest pain, shortness of breath, fast/irregular heartbeat, swelling of the hands/feet, or seizures. A serious allergic reaction to this drug is rare. However, seek medical help if you notice any symptoms of a serious allergic reaction.

Precautions: Before using levothyroxine, tell your doctor or pharmacist if you are allergic to it or if you have any other allergies. This medication should not be used if you have certain medical conditions. Before using this medication, tell your doctor or pharmacist your medical history, especially if you have heart problems, high blood pressure, diabetes, or other hormone disorders. Caution is advised when using this drug in the elderly and in children. Consult your doctor for more details. This drug may be used during pregnancy and passes into breast milk.

Drug Interactions: This medication may interact with other drugs. Keep a list of all the products you use and share it with your doctor and pharmacist. Do not start, stop, or change the dosage of any medicines without your doctor’s approval. Check the labels on all your medicines, as they may contain ingredients that could increase your heart rate or blood pressure.

Overdose: If overdose is suspected, contact a poison control center or emergency room immediately. Symptoms of overdose may include fast/irregular heartbeat, chest pain, confusion, or loss of consciousness.

Notes: Do not share this medication with others. Regular laboratory and/or medical tests should be performed to monitor your progress or check for side effects.

Missed Dose: If you miss a dose, contact your doctor or pharmacist immediately to establish a new dosing schedule. Do not double the dose.

Storage: Store at room temperature away from light and moisture. After mixing, discard any unused portion. Keep all medications away from children and pets.

Report Problems to the Food and Drug Administration

If you experience negative side effects of prescription drugs, report them to the FDA.

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Conditions of use: The information in this database is intended to supplement the expertise and judgment of healthcare professionals. It is not intended to cover all possible uses, directions, precautions, drug interactions, or adverse effects. Consult a healthcare professional before taking any drug, changing your diet, or starting or discontinuing any course of treatment.

Conditions of use: The information in this database is intended to supplement the expertise and judgment of healthcare professionals. It is not intended to cover all possible uses, directions, precautions, drug interactions, or adverse effects. Consult a healthcare professional before taking any drug, changing your diet, or starting or discontinuing any course of treatment.