To follow up - does the homeopathic medication oscillococcinum & belladona interact with eliquis?

For sure, there is no interaction between eliquis and belladonna and oscillococcinum is made from duck heart and liver extracts so it should not interact with eliquis by my opinion but there is no scientific way for checking the interaction because oscillococcinum is supplement, not a drug. I hope you find this input helpful.

Unlikely that a homeopathic remedy would cause any adverse interaction with your Eliquis, but am not aware of any scientific studies available. Would contact your doctor prior to using the preparations described and discuss his(or her) views?