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This is especially the case if you have underlying health conditions or are taking other medications. L-theanine supplements could interact with some anti-anxiety, blood-pressure, and sleep meds ...
The team behind the recent study had previously shown that levothyroxine use, particularly in people it is used in unnecessarily, can have an array of unwanted side effects.
Levothyroxine has a half-life of 7.5 days when taken daily, so about six weeks is required for it to reach a steady level in the blood. [5] Side effects from excessive doses include weight loss, trouble tolerating heat, sweating, anxiety, trouble sleeping, tremor, and fast heart rate. [5]
L-theanine also has the potential to sharpen your attention span and other cognitive capabilities, so taking it in the morning or during the day might work better for you if these are the effects ...
The name theanine usually refers to the enantiomer L-theanine, which is the form found in tea leaves from which it is extracted as a powder. [4] [6] The right-handed enantiomer, D-theanine, is less-studied. Theanine is sold as a dietary supplement and is considered to be safe at doses up to 250 milligrams (mg) by the US Food and Drug ...
It is used to treat hypothyroidism, [1] but less preferred than levothyroxine. [1] It is taken by mouth. [1] Maximal effects may take up to three weeks to occur. [1] Side effects may occur from excessive doses. [1] This may include weight loss, fever, headache, anxiety, trouble sleeping, arrhythmias, and heart failure. [1]
Side effects may occur from excessive doses. [2] This may include weight loss, fever, headache, anxiety, trouble sleeping, arrhythmias, and heart failure. [2] Use in pregnancy and breastfeeding is generally safe. [3] [2] Liothyronine was approved for medical use in 1956. [2] It is available as a generic medication. [3]
Certain medications can have the unintended side effect of affecting thyroid function. While some medications can lead to significant hypothyroidism or hyperthyroidism and those at risk will need to be carefully monitored, some medications may affect thyroid hormone lab tests without causing any symptoms or clinical changes, and may not require treatment.