Title: Synthroid (Levothyroxine) & Weight Gain: An Uncommon Reaction - Mental Health Daily
Headings: Synthroid (Levothyroxine) & Weight Gain: An Uncommon Reaction
Synthroid (Levothyroxine) & Weight Gain: An Uncommon Reaction
Synthroid (Levothyroxine) and Weight Gain
How Synthroid May Cause Weight Gain (Possibilities)
Variables that may influence weight gain from Synthroid (Levothyroxine)
Synthroid dosage
Duration of administration
Other medications
Individual factors
Synthroid (Levothyroxine) & Weight Gain (The Research)
How much weight will you gain from synthroid (levothyroxine)?
Does everyone gain weight from taking synthroid (levothyroxine)?
Have you experienced weight gain from synthroid (levothyroxine)?

Content: Although synthroid is a synthetically-engineered form of thyroxine called “levothyroxine,” and isn’t bioidentical to endogenously secreted thyroxine (via properly functioning thyroid glands), it is similar enough to improve hypothyroidism biomarkers and symptoms. Assuming the dosage of synthroid is properly calibrated for the specific user, severe side effects and/or adverse reactions are unlikely. Most people are able to tolerate synthroid over a long-term (many years) without complaints of unwanted side effects. Despite the favorable tolerability of synthroid for most users, a subset of users report significant unwanted synthroid side effects, one of which is often weight gain. It is unclear as to how synthroid may cause weight gain as most literature suggests that it is “weight neutral” or unlikely to affect body weight. However, there is some evidence to suggest that older adults (ages 45 and up) may gain weight as a result of synthroid treatment. Synthroid (Levothyroxine) and Weight Gain
Firstly, it is important note that most medical literature suggests that synthroid does NOT cause significant weight gain. However, assuming you haven’t made any profound changes in eating habits, activity/exercise level, etc. while taking synthroid, yet you’ve packed on a noticeable amount of poundage – it’s probably safe to assume that it was triggered by the drug. Just because the majority of synthroid users are unlikely to gain weight, does not mean that synthroid-induced weight gain should be dismissed as a medical impossibility.