{"id":630043,"date":"2024-10-17T09:30:02","date_gmt":"2024-10-17T13:30:02","guid":{"rendered":"https:\/\/www.singlecare.com\/blog\/?p=630043"},"modified":"2024-10-25T09:41:12","modified_gmt":"2024-10-25T13:41:12","slug":"synthroid-and-breastfeeding","status":"publish","type":"post","link":"https:\/\/www.singlecare.com\/blog\/synthroid-and-breastfeeding\/","title":{"rendered":"Is it safe to take Synthroid while breastfeeding?"},"content":{"rendered":"<p><a href=\"https:\/\/www.singlecare.com\/prescription\/synthroid\"><span style=\"font-weight: 400;\">Synthroid (levothyroxine)<\/span><\/a><span style=\"font-weight: 400;\"> is a popular prescription medication used for treating hypothyroidism. Those with hypothyroidism don&rsquo;t produce enough thyroid hormone, so healthcare providers treat patients with a synthetic hormone, like Synthroid.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">In most cases, breastfeeding mothers can safely use Synthroid. What&rsquo;s even better is that taking Synthroid while breastfeeding can benefit both the postpartum mother and the baby.<\/span><\/p>\n<h2 id=\"can-you-take-synthroid-while-breastfeeding\"><span style=\"font-weight: 400;\">Can you take Synthroid while breastfeeding?<\/span><\/h2>\n<p><span style=\"font-weight: 400;\">&ldquo;Yes, Synthroid (levothyroxine) can be taken while breastfeeding,&rdquo; explains <\/span><a href=\"https:\/\/aeroflowbreastpumps.com\/blog\/authors\/dr.-jessica--madden?srsltid=AfmBOoqcrcUAKd6lu3-nPLRdOS_V-FNnuoKr_dA3ucTUTEd3EkSaCcPI\" target=\"_blank\" rel=\"noopener\"><span style=\"font-weight: 400;\">Jessica Madden, MD<\/span><\/a><span style=\"font-weight: 400;\">, medical director at Aeroflow Breastpumps and a board-certified pediatrician, neonatologist, and lactation consultant. &ldquo;It is classified as an L1 medication during lactation, which means that it is not associated with a risk for adverse side effects in infants whose mothers take it while breastfeeding.&rdquo;<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Before we get further into Synthroid and breastfeeding, let&rsquo;s break down the basics of Synthroid and why it is used. Levothyroxine, sold under the brand name Synthroid, is the human-made, or synthetic version, of the natural thyroid hormone thyroxine. Several thyroid disorders can cause an underactive thyroid.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">The types of hypothyroidism are broken down into three categories:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>Primary hypothyroidism:<\/b><span style=\"font-weight: 400;\"> The primary form of hypothyroidism is caused by an issue in the thyroid gland. An autoimmune disease like Hashimoto&#8217;s thyroiditis may be the underlying cause of this dysfunction. Latrogenic hypothyroidism, where a person produces abnormally low levels of the thyroid, is another primary type. This form may happen if someone has thyroid cancer and undergoes a thyroidectomy (where part or all of the thyroid is removed). They will need additional thyroid hormones throughout their lives.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>Secondary hypothyroidism: <\/b><span style=\"font-weight: 400;\">This form of hypothyroidism is caused by issues in the pituitary gland. <\/span><span style=\"font-weight: 400;\">Problems with the pituitary gland can cause an insufficient release of the <\/span><a href=\"https:\/\/www.singlecare.com\/blog\/tsh-test\/\"><span style=\"font-weight: 400;\">thyroid-stimulating hormone (TSH)<\/span><\/a><span style=\"font-weight: 400;\">, which determines how much thyroid hormone is produced in the thyroid gland.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>Tertiary hypothyroidism:<\/b><span style=\"font-weight: 400;\"> The third type is the rarest form of hypothyroidism and is related to the hypothalamus. Problems in the hypothalamus may result in insufficient <\/span><a href=\"https:\/\/www.singlecare.com\/blog\/normal-thyroid-levels\/\"><span style=\"font-weight: 400;\">thyrotropin-releasing hormone (TRH)<\/span><\/a><span style=\"font-weight: 400;\">. TRH regulates the thyroid gland and endocrine system.<\/span><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">All types of hypothyroidism come with many noticeable symptoms, which may become more severe over time. To combat these symptoms, patients can take a thyroid medication, like Synthroid. Common symptoms of hypothyroidism include:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Fatigue<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Constipation<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Dry skin<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Weight gain<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Muscle weakness<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Muscle aches<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Slowed heart rate<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Depression<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Memory problems<\/span><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">It&rsquo;s also possible to have an overactive thyroid disorder, like Graves&rsquo; disease. This diagnosis would require antithyroid drugs, which work to decrease levels of thyroid hormones (the opposite of Synthroid). If you suspect you or someone you know may have thyroid problems, speak to a healthcare provider about medical advice. A specialist, like an endocrinologist, can do thyroid function tests, which consist of blood tests, imaging, and antibody tests.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Now, let&rsquo;s get back to taking Synthroid and breastfeeding babies. Along with all the symptoms of hypothyroidism mentioned above, there are also symptoms specific to new mothers. &ldquo;Hypothyroidism can interfere with milk production, so it&rsquo;s especially important for mothers with hypothyroidism to take Synthroid during lactation,&rdquo; said Dr. Madden. If hypothyroidism is causing a low breast milk supply, it&rsquo;s possible that Synthroid can increase the body&rsquo;s milk production.<\/span><\/p>\n<h2 id=\"how-long-should-i-wait-to-breastfeed-after-taking-synthroid\"><span style=\"font-weight: 400;\">How long should I wait to breastfeed after taking Synthroid?<\/span><\/h2>\n<p><span style=\"font-weight: 400;\">&ldquo;It&rsquo;s generally safe to breastfeed without waiting after taking Synthroid, but it&#8217;s still a good idea to ask your doctor first if you&#8217;re worried,&rdquo; says <\/span><a href=\"https:\/\/www.doctorrajd.com\/\" target=\"_blank\" rel=\"noopener\"><span style=\"font-weight: 400;\">Raj Dasgupta, MD<\/span><\/a><span style=\"font-weight: 400;\">, internist and program director at Huntington Health Hospital in California.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">&ldquo;Synthroid (levothyroxine) has a half-life of 5-7 days, but only a tiny amount of that goes into your breast milk,&rdquo; Dr. Dasgupta explains. A half-life of 5 to 7 days means the amount of the drug in the body is reduced by half within a week. However, even immediately after taking a dose of Synthroid, the amount of the drug that goes into the human milk supply is minimal. Of the tiny amount that makes it to the breast milk, <\/span><a href=\"https:\/\/pubmed.ncbi.nlm.nih.gov\/30000798\/\" target=\"_blank\" rel=\"noopener\"><span style=\"font-weight: 400;\">research has found<\/span><\/a><span style=\"font-weight: 400;\"> that taking &ldquo;levothyroxine during breastfeeding indicates no adverse effects in infants.&rdquo;<\/span><\/p>\n<p><span style=\"font-weight: 400;\">&ldquo;There are not any case reports of side effects in babies whose mothers take Synthroid while breastfeeding,&rdquo; Dr. Madden agrees.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">The American Thyroid Association even <\/span><a href=\"https:\/\/pubmed.ncbi.nlm.nih.gov\/30000062\/\" target=\"_blank\" rel=\"noopener\"><span style=\"font-weight: 400;\">recommends<\/span><\/a><span style=\"font-weight: 400;\"> &ldquo;that subclinical and overt hypothyroidism should be treated with levothyroxine in lactating women seeking to breastfeed.&rdquo; The association further added that adequate treatment with levothyroxine may normalize milk production in mothers with a low milk supply.<\/span><\/p>\n<h2 id=\"side-effects-of-synthroid-while-breastfeeding\"><span style=\"font-weight: 400;\">Side effects of Synthroid while breastfeeding<\/span><\/h2>\n<p><span style=\"font-weight: 400;\">&ldquo;If a mother takes too high of a dose, she may develop symptoms of hyperthyroidism,&rdquo; says Dr. Madden. Hyperthyroidism happens when the body makes too much of the thyroid hormone.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Symptoms of hyperthyroidism from taking high doses of Synthroid that need to be adjusted may include:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Sweating<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Rapid heart rate<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Weight loss<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Insomnia<\/span><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">While the mother may experience these adverse events while on too high of a dose of Synthroid, Dr. Madden noted, &ldquo;her baby is not at risk of these side effects.&rdquo;<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Other common side effects for Synthroid users (typically found in those who have overtreatment) can include:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Hair loss<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Nervousness or irritability<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Chest pain<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Shortness of breath<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Changes in appetite<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Changes in menstrual periods<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Muscle weakness<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Tremors or muscle spasms<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Intolerance to heat<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Decreased bone density<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Impaired fertility<\/span><\/li>\n<\/ul>\n<h2 id=\"how-to-take-synthroid-while-breastfeeding\"><span style=\"font-weight: 400;\">How to take Synthroid while breastfeeding<\/span><\/h2>\n<p><span style=\"font-weight: 400;\">You should take Synthroid while breastfeeding the same way you would take it if you weren&rsquo;t breastfeeding. It will be important to monitor your weight post-birth for any fluctuations, as Synthroid&rsquo;s dose is based on body weight. Otherwise, you&rsquo;ll take the daily tablet dose as normal while breastfeeding.<\/span><\/p>\n<h2 id=\"the-bottom-line\"><span style=\"font-weight: 400;\">The bottom line<\/span><\/h2>\n<p><span style=\"font-weight: 400;\">Synthroid is safe to take while breastfeeding for the mother and baby. It can even help breastfeeding mothers increase their milk supply. While an almost undetectable amount of Synthroid will go into the milk, the side effects of the drug will not be passed to the baby.<\/span><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Synthroid (levothyroxine) is a popular prescription medication used for treating hypothyroidism. Those with hypothyroidism don&rsquo;t produce enough thyroid hormone, so healthcare providers treat patients with a synthetic hormone, like Synthroid. In most cases, breastfeeding mothers can safely use Synthroid. What&rsquo;s even better is that taking Synthroid while breastfeeding can benefit both the postpartum mother and [&hellip;]<\/p>\n","protected":false},"author":135,"featured_media":629998,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[4589],"tags":[8615,3896,8670],"coauthors":[15090],"class_list":["post-630043","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-drug-info","tag-pregnancy","tag-thyroid","tag-womens-health","franchise-maternal-matters","wpautop"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v27.4 (Yoast SEO v27.4) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Synthroid and breastfeeding: Safety and side effects<\/title>\n<meta name=\"description\" content=\"Discover if it&#039;s safe to take Synthroid while breastfeeding. Get expert insights on medication use and breastfeeding for your health and your baby&#039;s well-being.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.singlecare.com\/blog\/synthroid-and-breastfeeding\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Is Synthroid breastfeeding-safe?\" \/>\n<meta property=\"og:description\" content=\"This thyroid medication has no adverse effects for infants\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.singlecare.com\/blog\/synthroid-and-breastfeeding\/\" \/>\n<meta property=\"og:site_name\" content=\"The Checkup\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/singlecare\" \/>\n<meta property=\"article:published_time\" content=\"2024-10-17T13:30:02+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2024-10-25T13:41:12+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.singlecare.com\/blog\/wp-content\/uploads\/2024\/10\/Blog_101724_Is_it_safe_to_take_synthroid_while_breastfeeding-copy.webp\" \/>\n\t<meta property=\"og:image:width\" content=\"1920\" \/>\n\t<meta property=\"og:image:height\" content=\"1080\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/webp\" \/>\n<meta name=\"author\" content=\"Rebecca Rovenstine\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:title\" content=\"Is Synthroid breastfeeding-safe?\" \/>\n<meta name=\"twitter:description\" content=\"This thyroid medication has no adverse effects for infants\" \/>\n<meta name=\"twitter:creator\" content=\"@SingleCare\" \/>\n<meta name=\"twitter:site\" content=\"@SingleCare\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Rebecca Rovenstine\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"5 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/www.singlecare.com\\\/blog\\\/synthroid-and-breastfeeding\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.singlecare.com\\\/blog\\\/synthroid-and-breastfeeding\\\/\"},\"author\":{\"name\":\"Heidi Borst\",\"@id\":\"https:\\\/\\\/www.singlecare.com\\\/blog\\\/#\\\/schema\\\/person\\\/fda93df2f5d09af0d250b59dfb4b46f2\"},\"headline\":\"Is it safe to take Synthroid while breastfeeding?\",\"datePublished\":\"2024-10-17T13:30:02+00:00\",\"dateModified\":\"2024-10-25T13:41:12+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/www.singlecare.com\\\/blog\\\/synthroid-and-breastfeeding\\\/\"},\"wordCount\":1014,\"publisher\":{\"@id\":\"https:\\\/\\\/www.singlecare.com\\\/blog\\\/#organization\"},\"image\":{\"@id\":\"https:\\\/\\\/www.singlecare.com\\\/blog\\\/synthroid-and-breastfeeding\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/www.singlecare.com\\\/blog\\\/wp-content\\\/uploads\\\/2024\\\/10\\\/Blog_101724_Is_it_safe_to_take_synthroid_while_breastfeeding-copy.webp\",\"keywords\":[\"Pregnancy\",\"Thyroid\",\"Women's health\"],\"articleSection\":[\"Drug Info\"],\"inLanguage\":\"en-US\"},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/www.singlecare.com\\\/blog\\\/synthroid-and-breastfeeding\\\/\",\"url\":\"https:\\\/\\\/www.singlecare.com\\\/blog\\\/synthroid-and-breastfeeding\\\/\",\"name\":\"Synthroid and breastfeeding: Safety and side effects\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.singlecare.com\\\/blog\\\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\\\/\\\/www.singlecare.com\\\/blog\\\/synthroid-and-breastfeeding\\\/#primaryimage\"},\"image\":{\"@id\":\"https:\\\/\\\/www.singlecare.com\\\/blog\\\/synthroid-and-breastfeeding\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/www.singlecare.com\\\/blog\\\/wp-content\\\/uploads\\\/2024\\\/10\\\/Blog_101724_Is_it_safe_to_take_synthroid_while_breastfeeding-copy.webp\",\"datePublished\":\"2024-10-17T13:30:02+00:00\",\"dateModified\":\"2024-10-25T13:41:12+00:00\",\"description\":\"Discover if it's safe to take Synthroid while breastfeeding. 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