What do levothyroxine tablets do?
LEVOTHYROXINE (Levothroid(R), Levoxyl(R), Synthroid(R), Unithroid(R) and others) acts as a replacement for people whose thyroid gland does not produce enough thyroid hormone. Levothyroxine can improve symptoms of thyroid deficiency such as slow speech, lack of energy, weight gain, hair loss, dry thick skin and unusual sensitivity to cold. Levothyroxine also helps to treat a condition called goiter, which is an enlarged thyroid gland. Generic levothyroxine tablets are available.
What should my health care professional know before I take levothyroxine?
They need to know if you have any of these conditions:
high blood pressure
low levels of pituitary hormone
dieting or on a weight loss program
previous heart attack
an unusual or allergic reaction to levothyroxine, other thyroid hormones, medicines, foods, dyes, or preservatives
pregnant or trying to get pregnant
How should I take this medicine?
Take levothyroxine tablets by mouth 30?60 minutes before a meal (on an empty stomach) with a full glass of water. The doses should be taken at regular intervals as indicated on the medication label. Do not take your medication more often than directed.
Contact your pediatrician or health care professional regarding the use of this medicine in children. Special care may be needed.
What if I miss a dose?
If you miss a dose, take it as soon as you can. If it is almost time for your next dose, take only that dose. Do not take double or extra doses.
What other medicines can interact with levothyroxine?
calcium supplements, like Tums(R) and many others
female hormones, including contraceptive or birth control pills
medicines for colds and breathing difficulties
medicines for diabetes
medicines for mental depression
medicines or herbals used to decrease weight or appetite
phenobarbital or other barbiturate medications
prednisone or other corticosteroids
Tell your prescriber or health care professional about all other medicines you are taking, including non-prescription medicines, nutritional supplements, or herbal products. Also tell your prescriber or health care professional if you are a frequent user of drinks with caffeine or alcohol, if you smoke, or if you use illegal drugs. These may affect the way your medicine works. Check with your health care professional before stopping or starting any of your medicines.
What side effects may I notice from taking levothyroxine?
difficulty breathing, wheezing, or shortness of breath
Side effects that you should report to your prescriber or health care professional as soon as possible:
excessive sweating or intolerance to heat
fast or irregular heartbeat or pulse rate
skin rash or hives
swelling of ankles, feet or legs
Side effects that usually do not require medical attention (report to your prescriber or health care professional if they continue or are bothersome):
changes in appetite
changes in menstrual periods