Symptoms usually get better or go away 1 to 8 weeks after you start taking the medicine. It may take as long as 6 months for your thyroid hormone levels to become normal.
I was wondering how long it takes before the thyroid medicine starts working. I was diagnosed with Hashi's last week (TSH 65 - under 3 normal, FT4 and T3 under 1, Antibody 600 - normal under 40), and started taking 125 mcg of Synthroid Monday.  Senior Member. It takes 6 weeks to have its full effect. You're doctor should have instructed you to come back for blood work at 6 weeks, then your dose can be adjusted if need be. Be patient, adjusting thyroid meds is a delicate process-and it can take 6 months to a year to get it right. I started on Armour about year ago-I felt better after a couple months-but it did nothing for my weight. 09-22-2013, 01:28 PM #3.  Antithyroid medications usually alleviate your hyperthyroid symptoms in six to 12 weeks. While there is no standard for how long you will take the medication, you will most likely continue with it for 12 to 18 months. That time period, combined with a gradual, controlled decrease in your dosage, lessens your chance of developing hyperthyroidism again. Antithyroid medications—sometimes written as anti-thyroid medications—are a common treatment for hyperthyroidism, particularly if you have an ongoing form of hyperthyroidism caused by Graves' disease or a goiter. The goal of antithyroid medications is to prevent the thyroid from producing excess amounts of hormone. How Well It Works. People with hypothyroidism who take thyroid hormone medicine usually notice: 1  Improved energy level. 2  Gradual weight loss (in people with severe hypothyroidism at the time of diagnosis). 3  Improved mood and mental function (thinking, memory). 4  Improved pumping action of the heart and improved digestive tract function. In most cases, thyroid hormone medicine works quickly to correct symptoms. Myxedema coma can respond well to thyroid hormone medicine and treatment in an intensive care unit. But a good outcome depends on how soon treatment starts. How Well It Works. Antithyroid medicines do not always start working right away. Symptoms usually get better or go away 1 to 8 weeks after you start taking the medicine. It may take as long as 6 months for your thyroid hormone levels to become normal. Antithyroid medicines work best if you have mild hyperthyroidism, if this is the first time you are being treated for Graves' disease, if you are younger than 50, or if your thyroid gland is only swollen a little bit (small goiter). 1 You will have to take thyroid hormone replacement for the remainder of your life. 2  It is a small pill that you take once a day (either first thing in the morning or before bedtime) on an empty stomach. 1 Yes. 2  You will have to take thyroid hormone replacement for the remainder of your life. 3 Best Answer: Hello, I've been synthroid or over 5 years now for hypothyroidism. I felt better pretty quickly when i first started taking it. (like in 3 weeks.) But had to take some time to find the right level of the medicine. We had to re-evaluate after I was on it for 3-6 months and see how much i really needed. How long does it take for thyroid medicine to work? I have started taking thyroxine for hypothyroidism one month ago, but have not yet noticed any improvement in symptoms. Some of these medicines include: 1  Calcium. 2  Take calcium supplements at least 4 hours before or after taking thyroid hormone medicine. 3  Iron supplements. 4  Birth control pills or other hormones. 5  Cholestyramine. 6  Sucralfate and some antacids containing aluminum hydroxide. In most cases, thyroid hormone medicine works quickly to correct symptoms. Myxedema coma can respond well to thyroid hormone medicine and treatment in an intensive care unit. But a good outcome depends on how soon treatment starts. You seem to be describing symptoms that are consistent with hypothyroidism (decreased thyroid hormone production). Besides decreased energy, bloating, and weight gain, patients with hypothyroidism also have cold intolerance, depression, and constipation. However, decreased energy and weight gain can be do to many other things other than hypothyroidism. Thus, your thyroid gland function must first be tested. Taking thyroid medication when you don't have hypothyroidism can be quite dangerous.
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how long does it take for thyroid medication to work