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Thyroid Hormones (Systemic)
Brand name(s): hyro
Proper Use of This Medicine
Use this medicine only as directed by your doctor. Do not use more or less of it, and do not use it more often than your doctor ordered. Your doctor has prescribed the exact amount your body needs and if you take different amounts, you may experience symptoms of an overactive or underactive thyroid. Take it at the same time each day to make sure it always has the same effect.
If your condition is due to a lack of thyroid hormone, you may have to take this medicine for the rest of your life. It is very important that you do not stop taking this medicine without first checking with your doctor.
Dosing-
The dose of these medicines will be different for different patients. Follow your doctor's orders or the directions on the label. The following information includes only the average doses of these medicines. If your dose is different, do not change it unless your doctor tells you to do so.
The number of tablets that you take depends on the strength of the medicine. The amount of thyroid hormone that you need to take every day depends on the results of your thyroid tests. However, treatment is usually started with lower doses that are increased a little at a time until you are taking the full amount. This helps prevent side effects.
- For oral dosage form (tablets):
- For replacing the thyroid hormone:
- Adults and teenagers-At first, 0.0125 to 0.05 milligrams (mg) once a day. Then, your doctor may increase your dose a little at a time to 0.075 to 0.125 mg a day. The dose is usually no higher than 0.15 mg once a day.
- Children less than 6 months of age-The dose is based on body weight and must be determined by your doctor. The usual dose is 0.025 to 0.05 mg once a day.
- Children 6 months to 12 months of age-The dose is based on body weight and must be determined by your doctor. The usual dose is 0.05 to 0.075 mg once a day.
- Children 1 to 5 years of age-The dose is based on body weight and must be determined by your doctor. The usual dose is 0.075 to 0.1 mg once a day.
- Children 6 to 10 years of age-The dose is based on body weight and must be determined by your doctor. The usual dose is 0.1 to 0.15 mg once a day.
- Children over 10 years of age-The dose is based on body weight and must be determined by your doctor. The usual dose is 0.15 to 0.2 mg once a day.
- For replacing the thyroid hormone:
- For injection dosage form:
- For replacing the thyroid hormone:
- Adults and teenagers-50 to 100 micrograms (mcg) injected into a muscle or into a vein once a day. People with very serious conditions caused by too little thyroid hormone may need higher doses.
- Children less than 6 months of age-The dose is based on body weight and must be determined by your doctor. The usual dose is 0.019 to 0.038 mg once a day.
- Children 6 months to 12 months of age-The dose is based on body weight and must be determined by your doctor. The usual dose is 0.038 to 0.056 mg once a day.
- Children 1 to 5 years of age-The dose is based on body weight and must be determined by your doctor. The usual dose is 0.056 to 0.075 mg once a day.
- Children 6 to 10 years of age-The dose is based on body weight and must be determined by your doctor. The usual dose is 0.075 to 0.113 mg once a day.
- Children over 10 years of age-The dose is based on body weight and must be determined by your doctor. The usual dose is 0.113 to 0.15 mg once a day.
- For replacing the thyroid hormone:
- For oral dosage form (tablets):
- For replacing the thyroid hormone:
- Adults and teenagers-At first, 25 micrograms (mcg) a day. Some patients with very serious conditions caused by too little thyroid hormone may need to take only 2.5 to 5 mcg a day at first. Also, some patients with heart disease or the elderly may need lower doses at first. Then, your doctor may increase your dose a little at a time to up to 50 mcg a day if needed. Your doctor may want you to divide your dose into smaller amounts that are taken two or more times a day.
- For treating a large thyroid gland (goiter):
- Adults-At first, 5 mcg a day. Some patients with heart disease or the elderly may need lower doses at first. Then, your doctor may increase your dose a little at a time to 50 to 100 mcg a day.
- For replacing the thyroid hormone:
- For injection dosage form:
- For replacing the thyroid hormone in very serious conditions (myxedema coma):
- Adults-At first, 10 to 50 mcg injected into a vein every four to twelve hours. Then, your doctor may want to adjust your dose depending on your condition.
- Children-Use and dose must be determined by your doctor.
- For replacing the thyroid hormone in very serious conditions (myxedema coma):
- For oral dosage form (tablets):
- For replacing the thyroid hormone:
- Adults, teenagers, and children-At first, 50 micrograms (mcg) of levothyroxine and 12.5 mcg of liothyronine once a day. Some people with very serious conditions caused by too little thyroid hormone may need only 12.5 mcg of levothyroxine and 3.1 mcg of liothyronine once a day. Also, some elderly patients may need lower doses at first. Then, your doctor may want to increase your dose a little at a time to up to 100 mcg of levothyroxine and 25 mcg of liothyronine.
- For replacing the thyroid hormone:
- For oral dosage form (tablets):
- For replacing the thyroid hormone:
- Adults, teenagers, and children-At first, 32 milligrams (mg) a day. Some people with very serious conditions caused by too little thyroid hormone may need to take only 16 to 32 mg a day at first. Then, the doctor may want you to increase your dose a little at a time to 65 to 160 mg a day.
- For replacing the thyroid hormone:
- For oral dosage form (tablets):
- For replacing thyroid hormone:
- Adults, teenagers, and children-60 milligrams (mg) a day. Some people with very serious conditions caused by too little thyroid hormone may need to take only 15 mg a day at first. Also, some elderly patients may need lower doses at first. Then, your doctor may want you to increase your dose a little at a time to 60 to 120 mg a day.
- For replacing thyroid hormone:
Missed dose-
If you miss a dose of this medicine, take it as soon as possible. However, if it is almost time for your next dose, skip the missed dose and go back to your regular dosing schedule. Do not double doses. If you miss 2 or more doses in a row or if you have any questions about this, check with your doctor.
Storage-
To store this medicine:
- Keep out of the reach of children.
- Store away from heat and direct light.
- Do not store in the bathroom, near the kitchen sink, or in other damp places. Heat or moisture may cause the medicine to break down.
- Do not keep outdated medicine or medicine no longer needed. Be sure that any discarded medicine is out of the reach of children.
Last Revised: 06/21/2000
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have you checked your hormone levels, too
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how long??
Yes, it really does!! I'm 39 and am currently on and have been before on the drug. Of course, this is dependant on your age no doubt. Your obgyn should know. (But don't believe everything they say) My amenorrhea (lack of menses) is a result of my thyroid condition. I've now realized that it is just a "band-aid" solution for me however. The real problem lies in the thyroid condition I have which must be treated. This is probably the 5th time, at least the 4th, I am using the little white pills since age I guess sometime btw 20. You should take the drug at regular intervals according to the instructions. There are different doses so I'm not certain if there are different intervals. And yes, you can get pregnant after using the drug. -- I did, twice, and with ease let me add!! and I have a 13 1/3 yr son to show for it! Today marks the 2nd month I as well have not had my period. It ****s! I feel like the characters in the Harry Potter movie that get so fat they float away!. I am not fat either but have gained some weight. I just feel extremely bloated!! Given my hereditary, I was doubtful I was yet menopausal. So I show up again at the obgyn and say, give me the little white pill! He laughs but not too much. 7 yrs ago when he put me on birth control to help regulate me, he ardently advised if I want more kids, have them immediately! I was 32 then. I said I was ready but my spouse wasn't and so my clock will have to wait! Just last yr, 6 yrs after he told me to get pregnant immediately, I got pregnant (without conscientiously trying), and although I miscarried - it showed him!! My body is not ready to stop. I think we all know our bodies and better than the doctors know them! I cannot recount the numerous times I've been to the office late with my cycle and my dr. would suspect I was pregnant. He would ask if I had good news and I would say no without having even tested on my own. At first though, I would joke with him saying maybe, you never know, but if I had to bet on it and I love to gamble, I would say no, I'm just late. He would think for sure I was pregnant and be surprised I wasnt even though I'd be 2-3 months late, gain weight, feel nautious and whatever else symptoms could accompany pregnancy! But the 2 times I've been pregant I called him up and I TOLD HIM i was without even home testing!! The 1st time I was 3 months pregnant and getting my periods (figure that one out!!) The second time I was only 7 weeks pregnant - about 5 wks late and I knew immediately that I was not just skipping or late. So, my point, we know our bodies, we just need to listen. I told him that I will be having another child (on my own, naturally) sometime in the next 5 yrs (once my husband matures!) and I want him to deliver my next child so he should be ready and not consider retiring. He laughs but he knows not to laugh too much because its me! The pills work and I'd have been lost without them. I don't however remember exactly how long after finishing the meds that they start. I think btw 3-7 or 3-10 but you've got to realize that each body is different. Trust me, I consider myself an average person of 39 but I know my body is different and reacts different. You've got to learn your body. Following a gall bladder surgery, I had my dr tell me I had him scared and that my insides are unique and he has never seen anything like it before! Can you imagine -now I ask, what purpose did it serve for him to tell me that? I panicked and asked, are you telling me I am a freak of nature!! He said, no, just unique. Funny, it wasn't something I didn't already know but it shocked him! I warned him before the surgery but I guess he didn't take heed. I considered the following unique -- Heart surgery at age 5. Mono in 6th grade (they call that the kissing disease) - trust me I wasn't kissing at that age, my dad would of had my head! Chicken pox at 18. Regular period for 3 months while pregnant. Definatley not your normal Gall bladder surgery in '03. Irregular periods to the hilt! Or yet, am I just normal? That is the question. See, because to me I am very normal, but I must remember to others, my composition is unique. But it's what I've lived with and so it has been normal to me!! And so, yet, with all my uniqueness, I have a very loving, extremely intelligent and handsome (and it isn't just that I'm proud, I am told daily by numerous various sources) son of age 13 1/2. So you figure it out. Listen to your doctors but also ladies, KNOW your own body and do your own research. Get to the root of the problem or the problem or deal with the possibility of the problem repeating itself. CHOICE
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