synthroid and vitamin interactions with very serious conditions caused by too little thyroid synthroid and vitamin interactions may need higher doses. Children—The dose is based on body weight and must be determined by your doctor . Precautions While Using Synthroid It is very important that your doctor check your progress at regular visits. The mean daily thyroxine dose was 1.99 mcg/kg (range, 0.3 to 6.6 mcg/kg) with a mean duration of therapy of 20.4 years (range, less than 1 to 68 years). Absorption may also decrease with age. Seizures have occurred in a child ingesting 18 mg of levothyroxine. The presence of concomitant medical conditions should be considered in certain clinical circumstances and, if present, appropriately treated (see PRECAUTIONS ). The levothyroxine tablet synthroid and vitamin interactions dissolve very quickly and swell in the throat, possibly causing choking or gagging. Synthroid should be taken at least 4 hours apart synthroid and vitamin interactions drugs that are known to interfere with its absorption (see PRECAUTIONS - Drug Interactions). 10 FD&C YELLOW NO.
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However, in patients with high-risk tumors, the target level for TSH suppression may be < 0.01 mU/L. Take synthroid and vitamin interactions by mouth on an empty stomach at least one-half to one hour before breakfast. Secondary (Pituitary) and Tertiary (Hypothalamic) Hypothyroidism Adequacy of therapy should be assessed by measuring serum free- T4 levels, which should be maintained in synthroid and vitamin interactions upper half of the normal range in these patients. Where can I get more information? Your pharmacist can provide more synthroid and vitamin interactions about Synthroid. An overdose may cause life-threatening side effects, especially if you take Synthroid with an appetite-suppressant medication. 40 Aluminum Lake, FD&C Blue No. Possible side synthroid and vitamin interactions of Synthroid: All medicines may cause side effects, but many people have no, or minor, side effects. Thyroid hormones do not readily cross the placental barrier (see PRECAUTIONS - Pregnancy). Call your doctor for medical advice about side effects. However, serum T4 levels are usually normal but may occasionally be slightly increased. They include the following: General fatigue, increased appetite, weight loss, heat intolerance, fever, excessive sweating; Central nervous system headache, hyperactivity, nervousness, anxiety, irritability, emotional lability, insomnia; Musculoskeletal tremors, muscle weakness; Cardiovascular palpitations, tachycardia, arrhythmias, increased pulse and blood pressure, heart failure, angina, myocardial infarction, cardiac arrest; Respiratory dyspnea; Gastrointestinal diarrhea, vomiting, abdominal cramps and elevations in liver function tests; Dermatologic hair loss, flushing; Endocrine decreased bone mineral density; Reproductive menstrual irregularities, impaired fertility. If you develop chest pain or additional circulatory problems, your dosage may have to be reduced. Since postpartum TSH levels are similar to preconception values, the Synthroid dosage should return to the pre-pregnancy dose immediately after delivery. Levothyroxine sodium should not be used in the treatment of male or female infertility unless this condition is associated with hypothyroidism. Careful monitoring of diabetic control is recommended, especially when thyroid therapy is started, changed, or discontinued. Elimination Thyroid hormones are primarily eliminated by the kidneys. Hyperthyroidism may develop over several weeks and may persist for several months after therapy discontinuation. Pediatric Dosage - Congenital or Acquired Hypothyroidism (see PRECAUTIONS - Laboratory Tests) General Principles In general, levothyroxine therapy should be instituted at full replacement doses as soon as possible.
If the serum TSH level is not suppressed, Synthroid should be used with caution synthroid and vitamin interactions conjunction with careful monitoring of thyroid function for evidence of hyperthyroidism and clinical monitoring for potential associated adverse cardiovascular signs and symptoms of hyperthyroidism. Chloral Hydrate Diazepam Ethionamide Lovastatin Metoclopramide 6-Mercaptopurine Nitroprusside Para-aminosalicylate sodium Perphenazine Resorcinol (excessive topical use) Thiazide Diuretics These agents have been associated with thyroid hormone and/or TSH level alterations by various mechanisms. It is not intended as medical advice for individual conditions or treatment. Talk to your doctor, nurse or pharmacist before taking any prescription or over the counter drugs (including any herbal medicines or supplements) or following any treatment or regimen. The fetus, neonate, elderly and euthyroid patients with underlying thyroid disease (e.g., Hashimoto's thyroiditis or with Grave's disease previously treated with radioiodine or surgery) are among those individuals who are particularly susceptible to iodine-induced hypothyroidism. If OVERDOSE is suspected: Contact 1-800-222-1222 (the American Association of Poison Control Centers), your local poison control center (http://www.aapcc.org), or emergency room immediately. Seek medical attention right away if any of these SEVERE side effects occur when using Synthroid: Severe allergic reactions (rash; hives; itching; difficulty breathing; flushing; tightness in the chest; swelling of the mouth, face, lips, or tongue; unusual hoarseness); changes in appetite; changes in menstrual periods; chest pain; diarrhea; excessive sweating; fast or irregular heartbeat; fever; heat intolerance; joint pain; leg cramps; mental or mood changes (eg, anxiety, irritability, nervousness); muscle synthroid and vitamin interactions seizures; severe or persistent headache or fatigue; shortness of breath; stomach cramps; tremors; trouble sleeping; unusual weight gain or weight synthroid and vitamin interactions vomiting; wheezing. The synthetic T4 in Synthroid is identical to that produced naturally by the human thyroid gland. Generally, replacement therapy is to be taken for life, except in cases of transient hypothyroidism, which is usually associated with an inflammation of the thyroid gland (thyroiditis). However, long-term glucocorticoid therapy may result in slightly decreased T3 and T4 levels due to decreased TBG production (see above). This suspension can be administered by spoon or by dropper. It's advisable to check with your doctor before taking any other drug, but you should be especially wary of the following: Amiodarone (Cordarone) Androgens (male hormones) Antacids and anti-gas medications Antidepressants such as Elavil, Ludiomil, and Zoloft Blood pressure drugs such as beta blockers, nitroprusside, and thiazide diuretics Blood-thinning drugs such as Coumadin and heparin Chloral synthroid and vitamin interactions (a sedative) Diabetes drugs such as insulin and Micronase Digitalis-type drugs such as Lanoxin Estrogen products and oral contraceptives Furosemide (Lasix) Growth hormones Hormone inhibitors such as Cytadren and Tapazole Iodide Iron supplements Kayexalate Ketamine (Ketalar) Lithium (Eskalith, Lithobid) Methadone and heroin Metoclopramide (Reglan) Nonsteroidal anti-inflammatory drugs such as phenylbutazone and aspirin Parkinson's drugs such as synthroid and vitamin interactions Propylthiouracil (a thyroid inhibitor) Seizure medications such as Dilantin, Tegretol, and phenobarbital synthroid and vitamin interactions such as dexamethasone and hydrocortisone Stimulants such as epinephrine (EpiPen) Sucralfate (Carafate) The cancer drugs 5-fluorouracil, 6-mercaptopurine, mitotane, and tamoxifen The cholesterol-lowering drugs Colestid, Mevacor, and Questran The immune-system drugs interferon and interleukin The tranquilizers Trilafon and Valium The tuberculosis drugs aminosalicylate, rifampin, and ethionamide Theophylline (Theo-Dur) A high-fiber diet, soy-containing supplements, and walnuts can also interfere with Synthroid effects. Absorption may also decrease with age. The choice of laboratory tests depends on various factors including the etiology of the underlying thyroid disease, the presence of concomitant medical conditions, including pregnancy, and the use of concomitant medications (see PRECAUTIONS - Drug Interactions and Drug-Laboratory Test Interactions). Your dose of medications used to control these other conditions may need to be adjusted while you are taking Synthroid.