How the interaction occurs:
The cause of the interaction is not known. Your thyroid medicine may decrease the effects of your digoxin.
What might happen:
The effects of your digoxin may decrease and cause shortness of breath or a fast heartbeat.
What you should do about this interaction:
If you experience shortness of breath or a fast heartbeat, contact your doctor. The dose of your medicines may need adjusting.Your healthcare professionals (e.g. doctor or pharmacist) may already be aware of this drug interaction and may be monitoring you for it. Do not start, stop, or change the dosage of any medicine before checking with them first.
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