Drug interactions
Guggul + Levothyroxine
Severity: Minor
Guggul and Levothyroxine: minor interaction.
Last updated
For healthcare professionals — reference only. This page is a brief summary, not medical advice and not a substitute for official labeling or clinical judgement. Always verify before prescribing or dispensing.
Summary
Guggul has been reported to affect thyroid function and may alter thyroid hormone activity. The clinical significance with levothyroxine is uncertain and based on limited data.
What this interaction means in plain words
Guggul and Levothyroxine have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised.
Why it happens
The mechanism is not well established; guggul may influence thyroid hormone metabolism or activity.
What to do
Ask patients about herbal supplement use and recheck TSH if guggul is started or stopped during levothyroxine therapy.
What to ask your pharmacist
- Is there anything I should notice while taking both?
- Do I need to tell my doctor at the next visit?
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Other interactions of Levothyroxine
Frequently asked questions
Can I take Guggul with Levothyroxine?
MediHelp rates the interaction as minor. Guggul and Levothyroxine have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised. Guggul has been reported to affect thyroid function and may alter thyroid hormone activity. The clinical significance with levothyroxine is uncertain and based on limited data.
How serious is the interaction between Guggul and Levothyroxine?
MediHelp rates it minor, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Ask patients about herbal supplement use and recheck TSH if guggul is started or stopped during levothyroxine therapy.
What other medicines interact with Levothyroxine?
MediHelp also lists interactions of Levothyroxine with, for example, Cholestyramine, Sodium iodide i-131, Tiratricol. The full list is on the Levothyroxine page.
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