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Doctor insights on: Hypothyroidism Do Antibiotics Affect Tsa Blood Test

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What's the best blood test to get for hypothyroidism?

What's the best blood test to get for hypothyroidism?

TSH: Generally, your doctor will order a TSH, and perhaps also T4 and T3 (liothyronine) levels. This is usually sufficient to get an answer for hypothyroidism, though additional tests may be necessary. ...Read more

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Dr. Su Fairchild
1,212 doctors shared insights

Hypothyroidism (Definition)

The thyroid gland is an endocrine organ located in the front part of the neck. Its role is to make thyroid hormones, which control the way cells use energy. Hyperthyroidism results when the thyroid gland is overactive and too much thyroid hormone is produced, which speeds up metabolism. This results in weight loss, a quick heartbeat, sweating, nervousness, ...Read more


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Could a thyroid blood test miss a hypothyroid issue?

Could a thyroid blood test miss a hypothyroid issue?

Yes: There are several parts to a thyroid blood test. Often only 1 part is used, called a TSH (thyroid stimulating hormone.) if it is high normal and a person has symptoms of low thyroid, like depression, weight gain, intolerance to cold, the practitioner often gets a different test, a free circulating thyroid hormone. When it's all borderline it is often worth a trial of low dose thyroid replacement. ...Read more

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What can affect a T4 blood test to be diagnosed as having hypothyroidism?

What can affect a T4 blood test to be diagnosed as having hypothyroidism?

Many Things: Pregnancy, use of birth control or estrogen pills if female, testosterone levels if male, liver disease, kidney disease, and nutritional status can all affect levels of thyroid binding proteins, and the level of total T4 needed to maintain the free T4 in the desired range. While free T4 is a better reflection of thyroid status than total t4, the TSH level is best at measuring what's right for you. ...Read more

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Prolactin blood test is showing high, I am hypothyroid, is it because of my thyroid problem or any other reason?

Hyperprolactinemia: Hypothyroidism ( low thyroid) can elevate prolactin.. When thyroid is replaced well , prolactin should be normal.. If prolactin remains high, prolactinoma ( pituitary tumor producing prolactin) should be considered. ...Read more

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When hypothyroid, what will a liver blood test be looking for? Also, my tpoab were 16, can hasimoto's be ruled out?

When hypothyroid, what will a liver blood test be looking for? Also, my tpoab were 16, can hasimoto's be ruled out?

Hashimotos possible: Despite negative tpo ab, hashimoto's thyroiditis is still the most common cause for hypothyroidism. Liver tests can be abnormal when thyroid levels are extremely low, but are usually normal with mild hypothyroidism, or after treatment with thyroid hormone. ...Read more

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Will a fasting blood test tell if I have hypothyroidism?

Will a fasting blood test tell if I have hypothyroidism?

Yes it will: To diagnose Hypothyroidism you do not have to fast,but if your blood was collected while fasting for some other reason it is ok/And will tell if you have Hypothyroidism as long as you are tested for it.You need T3T4FreeT4 and TSH level done on fasting or non fasting specimen ...Read more

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What to do if I have all the symptoms of hypothyroidism, but had a 'normal' blood test?

What to do if I have all the symptoms of hypothyroidism, but had a 'normal' blood test?

TSH: If you have symptoms but you had a TSH that was normal, it is most likely something else. This test is very easy to do and quite specific . Ask you doctor to review the test with you and then go over your symptoms again. Many problems can masquerade as something else. ...Read more

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What is best time to take blood test for hypothyroid. with fasting/ any time of day/before having pills in the morning?

What is best time to take blood test for hypothyroid. with fasting/ any time of day/before having pills in the morning?

Any time: Blood for thyroid test can be taken any time. However, if you need to have blood tested in fasting state for other reasons, a sample for thyroid function tests can be collected at the same time. ...Read more

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Earlier today when at Dr for hypothyroid blood test, BP was 94 over 68. Then tonight it was 127 over 86 w/home kit (took 2x). Should I be concerned?

Earlier today when at Dr for hypothyroid blood test, BP was 94 over 68. Then tonight it was 127 over 86 w/home kit (took 2x). Should I be concerned?

No: Those are all normal BP readings. Your home kit may not be as accurate, blood pressure changes throughout the day. Next time you go to the doctor, take your kit and calibrate it against the doctors. Relax and have a great evening. ...Read more

Dr. John Leander Po
1,117 doctors shared insights

Antibiotic (Definition)

An antibiotic is a medicine that slows, stops, or kills germs. The germs are usually bacteria causing an infection in a person, so the person uses antibiotics to help his body get ...Read more