CBD or cannabidiol is a naturally occurring chemical compound in the cannabis plant. Our endocannabinoid system with its different receptors is found all over the body. The main function of the system is to regulate physiological processes, including the immune system. Cannabis has anticoagulant properties and can act as a blood thinner. It is vitally important though, if a person is already on blood thinners, to study up on how to include cannabis as part of the treatment. Cannabis directly affects the way blood platelets clot together. CBD specifically seems to block the metabolism of certain medications in the liver by affecting the cytochrome P450 enzymes.