I found this article that has info about meds like dilantin and thyroid. Interesting read...
http://www.emedicine.com/neuro/TOPIC371.HTM
Peggy - I have had trouble with Dilantin since September. Horrible side effects that progressively got worse. The I tired going onto the 30 mg kapseals. Still I don't feel right and I am not going to continue like this; if I can help it.
Thyroid hormones (including levothyroxine): Phenytoin may alter the metabolism of thyroid hormones, reducing its effect; there is limited documentation of this interaction, but monitoring should be considered.
AR-10 I am on 100mcg Levothyroxine sodium. Thanks for the input...Talk with my doctor on Tuesday!
What thyroid medication are you taking?
Get a TSH, a Free T4, and a Free T3 run, and see where your hormones really are. You may be high on your Free T3.
Inez, hi, I have been on dilantin for about 10 years. Why are you thinking of changing? Is there some kind of interaction or something?