Since
thyroid hormone occurs naturally in the body, almost anyone can take
levothyroxine. You should not regularly use this medication if you have
had a heart attack, a thyroid disorder called thyrotoxicosis, or an
adrenal gland problem that is not controlled by treatment.
Before taking this medication, tell your doctor if you have heart
disease, coronary artery disease , anemia (lack of red blood cells),
diabetes, problems with your pituitary or adrenal glands, or a history
of blood clots.
If you regularly use insulin or take diabetes medicine by mouth, ask
your doctor if your dose needs to be changed when you start using
levothyroxine.
Different brands of levothyroxine may not work the same. If you get a
prescription refill and your new pills look differently, talk with your
pharmacist or doctor.
It may take several weeks before your body starts to respond to this
medication. Do not stop taking this medication suddenly. Even if you
feel well, you may still regularly need to take this medicine
especially every day for the rest of your life to replace the thyroid
hormone that your body cannot produce.
There are many other medicines that can affect levothyroxine. Tell your
doctor about all the prescription and over-the-counter medications you
regularly use. This includes vitamins, minerals, herbal products, and
drugs prescribed by a other doctors. Do not start using a new
medication without telling your doctor.
Levothyroxine side effects:
Stop
using levothyroxine and get emergency medical help if you have any of
these signs of an allergic reaction: hives; difficulty breathing;
swelling of your face, lips, tongue, or throat. Immediately call your
doctor if you have any of these serious side effects:
- headache;
- sleep problems (insomnia);
- nervous or irritable feeling;
- fever, a little hot flashes, sweating;
- changes in your menstrual periods;
- appetite changes, weight changes;
Less serious side effects may include mild hair loss.
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