Patient Resources

The most common side effects may include headache, nervousness, irritability, increased appetite, and sweating. If you experience any severe or persistent side effects while taking Synthroid, it is recommended to seek medical attention. Common side effects may include synthroid binders headache, nervousness, irritability, sweating, and increased appetite. It is important to note that these side effects are generally mild and transient. If you experience any severe or persistent side effects, you should consult your healthcare provider.

Antidepressant Therapy

If so, advise them to stop biotin supplementation at least 2 days before assessing TSH and/or T4 levels see Dosage and Administration (2.4) and Drug Interactions (7.10). One is that the peak therapeutic effect of levothyroxine at a given dose may not be obtained for 4-6 weeks after medication is ingested. Dosing here should be individualized based on whether the patients were diagnosed with hypothyroidism prior to pregnancy or during the pregnancy.

Drug Label Info

Because of the increased prevalence of cardiovascular disease among the elderly, initiate SYNTHROID at less than the full replacement dose see Dosage and Administration (2.3) and Warnings and Precautions (5.2). Atrial fibrillation is the most common of the arrhythmias observed with levothyroxine overtreatment in the elderly. Initiate SYNTHROID therapy in this population at lower doses than those recommended in younger individuals or in patients without cardiac disease see Dosage and Administration (2.3) and Use in Specific Populations (8.5). Assess compliance, dose of medication administered, and method of administration prior to increasing the dose of SYNTHROID see Warnings and Precautions (5.1) and Use in Specific Populations (8.4). Circulating thyroid hormones are greater than 99% bound to plasma proteins, including thyroxine-binding globulin (TBG), thyroxine-binding prealbumin (TBPA), and albumin (TBA), whose capacities and affinities vary for each hormone.

• The peak therapeutic effect of a given dose of SYNTHROID may not be attained for 4 to 6 weeks.
• The choice between the two may depend on factors such as cost, availability, and individual patient preferences.
• One is that the peak therapeutic effect of levothyroxine at a given dose may not be obtained for 4-6 weeks after medication is ingested.
• This hormone nuclear receptor complex activates gene transcription and synthesis of messenger RNA and cytoplasmic proteins.
• Thyroid hormones exert their physiologic actions through control of DNA transcription and protein synthesis.

Initiate appropriate supportive treatment as dictated by the patient’s medical status. In the U.S. general population, the estimated background risk of major birth defects and miscarriage in clinically recognized pregnancies is 2% to 4% and 15% to 20%, respectively. Concurrent use of tyrosine-kinase inhibitors such as imatinib may cause hypothyroidism. Monitor serum free-T4 levels and maintain in the upper half of the normal range in these patients. Stop biotin and biotin-containing supplements for at least 2 days before assessing TSH and/or T4 levels see Drug Interactions (7.10). Inquire whether patients are taking biotin or biotin-containing supplements.

Key Differences Between Lannett Levothyroxine and Synthroid

Levothyroxine is a medication that is commonly used to treat hypothyroidism, a condition in which the thyroid gland does not produce enough thyroid hormone. It is a synthetic form of the hormone thyroxine, which is normally produced by the thyroid gland. Levothyroxine works by replacing or supplementing the thyroid hormone in the body. Thyroid hormones exert their physiologic actions through control of DNA transcription and protein synthesis. Triiodothyronine (T3) and L-thyroxine (T4) diffuse into the cell nucleus and bind to thyroid receptor proteins attached to DNA.

If so, advise them to stop biotin supplementation at least 2 days before assessing TSH and/or T4 levels see DOSAGE AND ADMINISTRATION and DRUG INTERACTIONS. By visiting Synthroid.com, patients can access additional support and resources to understand and manage their hypothyroidism. The Before Breakfast Club is a program designed to help support your patients on SYNTHROID therapy. After joining, patients will receive exclusive benefits including savings, tips, and tools to help your patients make the most of their SYNTHROID treatment.

Initiation of thyroid hormone therapy prior to initiating glucocorticoid therapy may precipitate an acute adrenal crisis in patients with adrenal insufficiency. Treat patients with adrenal insufficiency with replacement glucocorticoids prior to initiating treatment with SYNTHROID see CONTRAINDICATIONS. The signs and symptoms of overdosage are those of hyperthyroidism see Warnings and Precautions (5) and Adverse Reactions (6).

• Biotin supplementation is known to interfere with thyroid hormone immunoassays that are based on a biotin and streptavidin interaction, which may result in erroneous thyroid hormone test results.
• Administration of sertraline in patients stabilized on SYNTHROID may result in increased SYNTHROID requirements.
• Common side effects of levothyroxine include headache, nervousness, and irritability.
• SYNTHROID is not indicated for treatment of hypothyroidism during the recovery phase of subacute thyroiditis.

I go over with them the fact that they should check the label at the pharmacy, on the bottle, to make sure it says brand-name SYNTHROID and not generic levothyroxine. And in many cases, to also pop the top off the bottle while they are at the pharmacy counter and look at the pills and make sure they have SYNTHROID embossed on those tablets. Dr. Frieze suggests educating patients on the importance of consistent therapy & precise dosing with Synthroid.

Administer SYNTHROID as a single daily dose, on an empty stomach, one-half to one hour before breakfast. U.S.-based MDs, DOs, NPs and PAs in full-time patient practice can register for free access to the Prescribers’ Digital Reference on PDR.net. PDR.net is to be used only as a reference aid, it is not intended to be a substitute for the exercise of professional judgement.

Congenital Hypothyroidism

I talk about the fact that it’s important to take the medication in the same timing and pattern each day, take it on an empty stomach minutes before they eat. So, as a reminder, SYNTHROID is indicated for the treatment of hypothyroidism. That is primary, secondary, or tertiary hypothyroidism, either due to congenital or acquired state.