doctors and pharmacists usually recommend that you consistently use the same brand name or generic thyroid product. thyroid hormone increases the metabolic rate of cells of all tissues in the body. receptor binding leads to activation or repression of dna transcription, thereby altering the amounts of mrna and resultant proteins manufacturer of synthroid. the synthesis and secretion of the major thyroid hormones, l-thyroxine (t4) and l-triiodothyronine (t3), from the normally functioning thyroid gland are regulated by complex feedback mechanisms of the hypothalamic-pituitary-thyroid axis. in adults, thyroid hormone helps to maintain brain function, food metabolism, and body temperature, among other effects. thyroid hormones also appear to have direct effects on tissues, such as increased myocardial contractility and decreased systemic vascular resistance. levothyroxine may increase the effect of blood thinners such as warfarin (coumadin). thyroid hormone is usually taken in the morning to prevent insomnia at night. side effects from coffee consumption synthroid, other than overdose symptoms, are rare synthroid weight. thyrotoxicosis may result in the growth of goiters and/or hypothyroidism. this means that ingestion of one mg of generic levothyroxine may not have the same effect on the body as one mg of another generic or branded levothyroxine synthroid canada. tell your doctor your medical history especially : if you have a heart disease such as coronary artery disease, hypertension, or angina. once the doctor finds the best dose for you, you will need to have a tsh test every 6 to 12 months to ensure that you are still getting the amount of levothyroxine your body needs. it is important to be aware of drug interactions, as well as common side effects on the user synthroid generic name. levothyroxine is usually started at 0. com, the prescription must be written for the product (levoxyl, levothroid, or unithroid) to be dispensed. intravenous administration of epinephrine to patients with coronary artery disease may lead to complications ranging from difficulty in breathing to a heart attack prescription synthroid. if symptoms occur, often they are due to toxic levels of thyroid hormone and the symptoms are those of hyperthyroidism. if this effect persists or worsens, notify your doctor as soon as possible. even a tiny change in the amount of levothyroxine your body absorbs can affect your tsh level and how you feel. symptoms of overdose may include chest pain, nervousness, trouble sleeping, tremor, rapid heartbeat, nausea, headache, fever, sweating, shortness of breath, heat intolerance, irregular menses, increased appetite, decreased weight, diarrhea, and abdominal pain. if overdose is suspected, contact your local poison control center or emergency room immediately. if you notice other effects not listed above, contact your doctor or pharmacist. g. never take more of this medication than is prescribed for you. for the same reason, the dose of digoxin (lanoxin), a drug used to manage heart failure or an irregular heart rhythm (e. this effect is usually temporary as your body adjusts to this medicine overdose of synthroid side effects. the mechanisms by which thyroid hormones exert their physiologic actions have not been completely elucidated. symptoms may include all or some of the following: chest pain, increased heart rate or pulse rate, excessive sweating, heat intolerance, nervousness, headache, insomnia, diarrhea, vomiting, weight loss, or fever. some may be allergic to the medicine breast feeding and synthroid.