From what I understand grapefruit can increase the dose. I have not heard of anything else doing this but I will try to find something
Take care
D
Hi I did a search and found this, it appears it is just the grapefruit juice. My Mom was told not to eat grapefruit with her Synthroid. I think it can increase that dose as well.
http://www.livestrong.com/article/517158-what-effect-does-drinking-grapefruit-juice-have-on-a-fentanyl-patch/
Grapefruit does interfere with the metabolizing of many medicines causing adverse effects, increasing OR decreasing the effects. There are other fruits that are hybrids of grapefruit that will cause the same effect.
What does the label of information say? Or your doctor?