Levothyroxine (By injection)
lee-voe-thye-ROX-een
Treats severe hypothyroidism.
Drug classes
Diagnostic Agent, Thyroid Function, Thyroid Supplement (About this – PubMed Health)
Uses
Uses of This Medicine
Levothyroxine is used to treat hypothyroidism, a condition where the thyroid gland does not produce enough thyroid hormone. Levothyroxine injection can be used as a substitute for the oral dose when a rapid effect is needed and when the oral route is not allowed .
This medicine is available only with your doctor’s prescription .
Other uses (PubMed Health)
How To Use
Injectable
Your doctor will prescribe your exact dose and tell you how often it should be given. This medicine is given through a needle placed in your vein or muscle.
A nurse or other health provider will give you this medicine.
Drugs and Foods to Avoid
Ask your doctor or pharmacist before using any other medicine, including over-the-counter medicines, vitamins, and herbal products.
Some medicines can affect how levothyroxine works. Tell your doctor if you are using any of the following:
A blood thinner, such as warfarin Digitalis Medicine for diabetes Medicine for depression, such as amitriptyline, maprotiline, or sertralineWhen Not To Use
This medicine is generally considered safe for most people. Talk to your doctor if you have concerns.
Warnings
Tell your doctor if you are pregnant or breastfeeding, or if you have heart disease, diabetes, pernicious anemia, or adrenal gland problems.
Possible side effects
Summary More details
Call your doctor right away if you notice any of these side effects:
Allergic reaction: Itching or hives, swelling in your face or hands, swelling or tingling in your mouth or throat, chest tightness, trouble breathing
Fast, pounding, or uneven heartbeat
Chest pain that may spread, trouble breathing, nausea, unusual sweating, fainting
If you notice these less serious side effects, talk with your doctor:
Appetite changes or weight loss
Nervousness, difficulty sleeping
Sweating, intolerance to heat
If you notice other side effects that you think are caused by this medicine, tell your doctor.
Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.
More side effects of this drug
Brand names include
NovaPlus levothyroxine sodium, PremierPro RX Levothyroxine Sodium, Synthroid
There may be other brand names for this medicine.
