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Doctor insights on: Antihistamines Thyroid

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Taking ptu (propylthiouracil) for overactive thyroid and Clomid also; does smoking affect thyroid hormones?

Taking ptu (propylthiouracil) for overactive thyroid and Clomid also; does smoking affect thyroid hormones?

Eye disease: Smoking will greatly increase your risk for developing grave's exophthalmopathy. Essentially, the eyes are pushed out because of immune deposits behind them. This will make it difficult for you to close your eyes. People go blind from this depending on severity. We don't understand why smoking increases your risk but it does. ...Read more

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Dr. Linda Callaghan
13 doctors shared insights

Thyroid (Definition)

The thyroid is an endocrine gland that sits in the lower part of the neck. It produces thyroid hormone - which ...Read more


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Will thyroid hormones or antithyroid medications interfere with a tc99m pertechnetate thyroid scan?

Will thyroid hormones or antithyroid medications interfere with a tc99m pertechnetate thyroid scan?

Not usually: Technetium is usually trapped by thyroid gland and used to determine in young children and infants the configuration of thyroid gland, hypoplasia, absence, or increased size or hyperplasia, or abnormal location. Radioactive iodine is used in older patients for determine function of thyroid gland, increased function or hyperthyroiidism or decreased function, hypothyroidism. ...Read more

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TSH 0.99,FT3 2.64,FT4 1.41,ATGO 0,ATPO 40.Is TSH suppressed?never took thyroid meds

TSH 0.99,FT3 2.64,FT4 1.41,ATGO 0,ATPO 40.Is TSH suppressed?never took thyroid meds

Thyroid levels: You do not supply the normal range for these values, but they all appear to be normal. In most US labs, the normal range of TSH is about 0.4 to 4.0, so that value of 0.99 is normal. ...Read more

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Can medication shrink thyroid nodules?

Usually not: In the distant past, thyroid hormone was used to 'shrink' nodules. More recent studies with ultrasound monitoring has shown that most nodules do not shrink with thyroid hormone treatment. Because thyroid cancer is the fastest increasing cancer in women, it is important to follow most thyroid nodules with ultrasound. With hashimoto's thyroiditis, there can be false or pseudonodules. ...Read more

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Can antihistamines cause hyperthyroidism?

Can antihistamines cause hyperthyroidism?

No.: But if they are combined with a decongestant (such as pseudoephedrine/sudafed) then the decongestant can cause some symptoms which can also occur with hyperthyroidism, including shakiness, fast pulse, feeling "wired", or anxious. ...Read more

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What medications treat follicular adenoma thyroid nodules?

What medications treat follicular adenoma thyroid nodules?

None: Medications are not used to treat follicular thyroid nodules. Usually they are observed only or removed surgically. ...Read more

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Tsh 0.01, free t4, 1.34, tpo 113 . On 25 synthroid, (thyroxine) 5 cytomel. Doc not happy with tsh. Isn't TSH suppressed when taking t3? Hashimoto's by biopsy.

Tsh 0.01, free t4, 1.34, tpo 113 .  On 25 synthroid, (thyroxine) 5 cytomel.  Doc not happy with tsh.  Isn't TSH suppressed when taking t3?  Hashimoto's by biopsy.

Depends: Your TSH is suppressed. Consider finding a good integrative medicine doctor or an nd to help with the autoimmune process. They can suggest things to actually bring down the tpo level and help your body heal. For your best long term outcome, more needs to be done than just thyroid meds. ...Read more

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Armour vs thyrolar (thyroxine and liothyronine) which is better thyriod medicine?

Armour vs thyrolar (thyroxine and liothyronine) which is better thyriod medicine?

Neither : The american thyroid association, the endocrine society and the american association of clinical endocrinologists all recommend the use of levothyroxine for the treatment of hypothyroidism and discourage the use of dessicated (dried) animal thyroid. ...Read more

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Can 50mcg of Synthroid (thyroxine) make thyroid nodules grow?

Can 50mcg of Synthroid (thyroxine) make thyroid nodules grow?

NO: Thyroid supplementation occasionally can help to shrink a nodule, and has been used to suppress the growth. ...Read more

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Synthroid (thyroxine) or Armour Thyroid for hypothyriodism?

Synthroid (thyroxine) or Armour Thyroid for  hypothyriodism?

Levothyroxine.: Levothyroxine, generic form of synthroid, has many advantages over armour thyroid. The armour product has significant batch to batch variation and has T3 (liothyronine) in it. Since the T3 (liothyronine) portion of armour has a very quick onset and short duration, it can wreak havoc with the ability to effectively treat hypothyroidism. Until there is a long-acting form of T3 (liothyronine) available, stick to levothyroxine. ...Read more

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Normal lab results, hyper thyroid symptoms. (tachycardia/insomnia) is Synthroid (thyroxine) or armour preferred? Possible adrenal issue?

Normal lab results, hyper thyroid symptoms. (tachycardia/insomnia) is Synthroid (thyroxine) or armour preferred?  Possible adrenal issue?

Not for hyper: Adding thyroid hormone replacement to a hyperthyroid gland will exacerbate the problem. If there is underlying adrenal insufficiency, adrenal crisis is more likely to occur in someone with hyperthyroidism. Highly recommend endocrine evaluation if you have these issues. ...Read more

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Would a thyroid condition cause sleepless nights? Taking Synthroid (thyroxine) meds

Would a thyroid condition cause sleepless nights? Taking Synthroid (thyroxine) meds

Too much Synthroid (thyroxine): Yes, restlessness and insomnia can occur if blood levels of TSH is low and freeT4 levels(thyroxine) are high because taking a higher dose of Synthroid. Should get a blood TSH level and free T4 levels and adjust Synthroid dosage .Sleeplessness may improve when TSH and thyroxine levels in blood is therapeutic . ...Read more

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Armour vs thyrolar (thyroxine and liothyronine) for thyriod medicine?

Armour vs thyrolar (thyroxine and liothyronine)  for thyriod medicine?

Not the best: All of the major professional societies for thyroid specialists, the endocrine society, the american thyroid association, and the american association of clinical endocrinologists have issued formal statements indicating that levothyroxine is the best choice for most patients. Both armour and thyrolar (thyroxine and liothyronine) provide too much T3 relative to t4, making it very difficult to keep tsh, free T4 & T3 normal. ...Read more

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Medicine for thyroid nodule?

Medicine for thyroid nodule?

Depends on problem: 3 major categories of potential health issues caused by thyroid nodules: a) large size affecting swallowing, breathing, voice ; b) over active production of thyroid hormone (hyperthyroid) ; and c) ~5% of nodules are cancer. Methimazole and ptu (propylthiouracil) are pills that block thyroid hormone production, treating b) above. Radioactive i-131 can shrink/destroy nodule, treating a) and b). Need surgery for c). ...Read more

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Does Claritin (loratadine) non-drowsy make you hyper?

Does Claritin (loratadine) non-drowsy make you hyper?

Antihistamine: Antihistamines can still cause drowsiness even if it says, non-drowsy, especially loratadine. Paradoxical effects of hyperactivity can be a side effect of antihistamines, though it tends to happen mostly in the very young or old. If you took a decongestant with it, then that can also cause hyperactivity. ...Read more

Benadryl (Definition)

Diphenhydramine is a sedating antihistamine which is a kind of antihistamine type drug (common ...Read more


Dr. Paul Carter
642 doctors shared insights

Antihistamine (Definition)

Sedating and non-sedating antihistamines prevent and treat allergic reactions, and are ...Read more