More frequent intervals of monitoring may be necessary if poor compliance is suspected or abnormal values are obtained. Given the long half-life of levothyroxine, such effects may not be present for several weeks after therapy initiation or dosage increases. The levothyroxine sodium dose is generally adjusted in 12.5-25 mcg increments until the patient with primary hypothyroidism is clinically euthyroid and the serum TSH has normalized. If you use any of the following drugs, use them at least 4 hours before or 4 hours after you take levothyroxine: synthroid itching carbonate (Caltrate, Citracal, synthroid itching and others); ferrous sulfate iron supplement; sucralfate (Carafate); sodium polystyrene sulfonate (Kayexalate, Kionex, and others); antacids that contain aluminum (Amphojel, Gaviscon, Maalox, Mylanta, Riopan, Rulox, Tums, and others); and cholesterol-lowering drugs cholestyramine (Questran) and colestipol (Colestid). Information for Patients Patients should be informed of the following information to aid in the safe and effective use of Synthroid: Notify your physician if you are allergic to any foods or medicines, are pregnant or intend to become pregnant, are breast-feeding or are taking any other medications, including prescription and over-the-counter preparations. Do not stop taking this medication suddenly. Do not stop taking this medication suddenly.
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People with very serious conditions caused by too little thyroid hormone 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. This suspension can be administered by spoon or by dropper. Seizures have occurred in a child ingesting 18 mg of levothyroxine. How should I take Synthroid? Take Synthroid exactly as prescribed by your doctor. Levothyroxine, at doses individualized according to patient response, is effective as replacement or supplemental therapy in hypothyroidism of any etiology, except transient hypothyroidism during the recovery phase of subacute synthroid itching Patients with coronary artery disease who are receiving levothyroxine therapy should be monitored closely during surgical procedures, since the possibility of precipitating cardiac arrhythmias may be greater in those treated with levothyroxine. See synthroid itching Synthroid side effects (in more detail) What other drugs will affect Synthroid? The following drugs may cause medical problems if you use them with Synthroid: lithium, amiodarone, or antidepressants. Taking levothyroxine over long periods of time may cause bone loss, which can lead to osteoporosis. Overtreatment has been associated with craniosynostosis in infants, and may adversely affect the synthroid itching of brain maturation and accelerate the bone age with resultant premature closure of the epiphyses and compromised adult stature. Do not miss any doses. 0-3 months 10-15 mcg/kg/day 3-6 months 8-10 mcg/kg/day 6-12 months 6-8 mcg/kg/day 1-5 years 5-6 mcg/kg/day 6-12 years 4-5 mcg/kg/day > 12 years but growth and puberty incomplete 2-3 mcg/kg/day Growth and puberty complete 1.7 mcg/kg/day Pregnancy Pregnancy may increase levothyroxine requirements (see PREGNANCY). 1 FD&C YELLOW NO. They include the following: synthroid itching 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. Do synthroid itching take an antacid or a product that has iron or calcium in it within 4 hours of taking Synthroid. However, if the serum TSH has not risen to greater than 20 mU/L, levothyroxine treatment should be discontinued for another 30-day trial period followed by repeat serum T4 and TSH testing. Adults In adult patients synthroid itching synthroid itching synthroid itching hypothyroidism, serum TSH levels (using a sensitive assay) alone may be used to monitor therapy. Abbott Laboratories North Chicago, IL 60064, synthroid itching 1 FD&C YELLOW NO.
In these patients, levothyroxine therapy should be initiated at lower doses than those recommended in younger individuals or in patients without cardiac disease (see WARNINGS, PRECAUTIONS synthroid itching Geriatric Use, and DOSAGE AND ADMINISTRATION). You should not use this medication if you have had a heart attack, a thyroid disorder called thyrotoxicosis, or an adrenal gland problem that is not controlled by treatment. Antidepressants - Tricyclics (e.g., Amitriptyline) - Tetracyclics (e.g., Maprotiline) - Selective Serotonin Reuptake Inhibitors (SSRIs; e.g., Sertraline) Concurrent use of tri/tetracyclic antidepressants and levothyroxine may increase the therapeutic and toxic effects of both drugs, possibly due to increased receptor sensitivity to catecholamines. Store Synthroid away from heat, moisture, and light. Dispense in a tight, lightresistant container as described in USP. Symptoms may include coma; confusion; disorientation; seizures. Pharmacokinetics Absorption Absorption of orally administered T4 from the gastrointestinal (GI) tract ranges from 40% to 80%. 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 hydrate (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 synthroid itching 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 Sinemet Propylthiouracil (a thyroid inhibitor) Seizure medications such as Dilantin, Tegretol, and phenobarbital Steroids 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. 10 synthroid itching Lake, FD&C Yellow No. Levothyroxine is also used to treat or prevent goiter (enlarged thyroid gland), which synthroid itching be caused by hormone imbalances, radiation treatment, surgery, or cancer.