CBD has very few known contraindications or warnings but here are a few confirmed medicine interactions:
CBD and Anticoagulants like Warfarin both use the body's hepatic P450 enzyme system.
CBD can competitively compete with the metabolism of warfarin thereby decreasing the degradation of warfarin and increase the risk of bleeding complications. Patients on warfarin who will be using cannabis should have their international normalized ratio monitored to detect any interaction between both drugs.
Our advice: Do not take CBD while on an Anticoagulants