if the cost of your thyroid medicine is a concern for you, talk with your doctor about using a generic product. in order to have your prescription for a generic thyroid product to be filled at drugstore. 3 and 3. in addition, thyroid hormones and thyroid status have varied effects on the pharmacokinetics and actions of other drugs. synthroid pill should be used only when clearly needed during pregnancy. levothyroxine may increase the effect of blood thinners such as warfarin (coumadin). 05 mg/day. your doctor will check your tsh level about 6 to 10 weeks after your dose is changed. notify your doctor immediately if you develop any if the following symptoms. avoid taking calcium and iron supplements within 4 hours of the medication and avoid taking soy products within 3 hours of the medication as these can reduce absorption of the medication. often the generic equivalents of brand name drugs are less expensive because the manufacturer doesn't have to recoup costs of research, development, and marketing. excessive dosage or a too rapid increase in dosage may lead to overstimulation of the thyroid gland. thyroid hormone increases the metabolic rate of cells of all tissues in the body. women may experience irregular menstrual cycles. the list of drug-thyroidal axis interactions in table 2 may not be comprehensive due to the introduction of new drugs that interact with the thyroidal axis or the discovery of previously unknown interactions. practically speaking, this means that when changing between levothyroxine manufactured by different pharmaceutical companies, a change in dose may be necessary to maintain the desired effect or to prevent toxicity. thyroid hormone increases the metabolic rate of cells of all tissues in the body. a listing of drug-thyroidal axis interactions is contained in table 2. this may cause symptoms of underreplacement or overreplacement synthroids cysts. levothyroxine is approved to treat hypothyroidism and to suppress thyroid hormone release in the management of cancerous thyroid nodules and growth of goiters. your doctor will also consider your current tsh level, any other health problems you may have, and other medicines you take. levothyroxine tablets usually are kept at room temperature, 15-30-c (59-86-f) in a light-resistant, tight container. generic drugs can save you money. in adults, thyroid hormone helps to maintain brain function, food metabolism, and body temperature, among other effects. if the patient develops a severe reaction to this drug like difficulty breathing, shortness of breath or swelling of the face and tongue it is imperative that the patient immediately seek medical intervention. people who are treated with synthroid pill may initially lose some hair, but this effect is usually temporary. , package inserts of newly approved drugs, medical literature) for additional information if a drug-drug interaction with levothyroxine is suspected. some synthroid pill products may not be interchangeable. tell your doctor your medical history especially : if you have a heart disease such as coronary artery disease, hypertension, or angina 088 synthroid. side effects:side effects that may occur while taking this medicine include headache, nervousness, trembling, sweating, increased appetite, diarrhea, weight loss or insomnia symptom of too much synthroid. this helps your doctor find the precise dose you need common side effects of synthroid. levothyroxine is usually started at 0. starting doses and dose changes may differ with individual patients based upon the presence of cardiovascular disease, the development of tolerance (reduced effectiveness with continued use), side effects to the medication, and blood levels of thyroid hormone. in addition, synthroid pill, levoxyl and levothroid also are prescribed with anti-thyroid drugs, for example methimazole (tapazole), to manage thyrotoxicosis (high thyroid hormone levels due to over-activity of the thyroid gland) synthroid and wellbutrin. don't change your thyroid medicine without your doctor's knowledge. synthetic levothyroxine may have adverse side effects like: palpitations, nervousness, headache, difficulty sleeping, insomnia, swelling of the legs and ankles, weight loss and/or increased appetite. thyroid hormones circulating in the blood act as feedback inhibitors of both tsh and trh secretion manufacturer of synthroid. take this medication at the same time each day whenever possible. the information provided using this web site is only intended to be general summary information to the public.