![]() Sometimes these inactive ingredients can cause problems for certain individuals. You are reacting to fillers, dyes, preservatives, or other inactive components of the medication –> You probably don’t even think about it when you take medications or supplements but these pills/capsules often contain a variety of strange ingredients all designed to keep the active ingredient safe and protected.There are 3 main reasons you may not tolerate medication including: It turns out that the reason many people react differently to certain medications is quite complex but we can break it down into an easy-to-understand way. With these basics in mind, we can talk about why some people experience side effects when taking T4 medication. You can compare synthetic thyroid hormones to ‘natural’ thyroid hormones such as NDT (Natural Desiccated Thyroid) which is derived from crushing animal thyroid glands. It is, however, synthetic in the sense that it is created in a lab. Levothyroxine is bio-identical, meaning it looks the exact same as the hormone that your body produces (2). Medications like birth-control pills contain altered hormone equivalents (1) that don’t always react the same way as natural hormones. This may sound obvious and not worth mentioning but it’s important because many hormones that doctors prescribe are not actually identical to the hormones that your body produces naturally. Levothyroxine is considered to be bio-identical, meaning it looks the exact same as the hormone that your thyroid gland produces naturally. The entire goal of using this medication is to attempt to normalize thyroid hormone levels in your body. Hypothyroidism is a hormone imbalance in which there is insufficient thyroid hormone circulating in the bloodstream.īecause thyroid hormone is required for life and optimal health it must be replaced if it is low which is the reason you are probably taking this medication. T4 (sometimes abbreviated LT4) contains the active ingredient Thyroxine which is the scientific name for T4 thyroid hormone. ![]() Levothyroxine is a T4-only medication and it is used in patients who have hypothyroidism. ![]() You would think so, but it isn’t as straightforward as you might think.īefore we talk about levothyroxine we need to discuss some basics… If you are simply replacing the hormone deficiency in your body, shouldn’t you experience only POSITIVE side effects? Should you experience any side effects when starting levothyroxine?Īfter all, why do we use hormone replacement therapy if not to replace low levels, to begin with? Starting on new thyroid medication can be tricky but this guide will help you figure out what to do in almost every situation: Understanding The Side Effects of Levothyroxine & What Causes Them I think you will find more value in reading about what kind of positive side effects you should be expecting, what happens if you don’t experience these side effects and what kind of bad side effects you might be experiencing, and what to do about those… If you are looking for the complete list of side effects from levothyroxine there will be a section below, but… If you fall into any of these categories don’t worry, because I’m going to go over each one of them. Why am I still gaining weight on thyroid medication?. ![]()
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