Is Garcinia Cambogia Safe While On Medication For Pulmonary Embolisms?

Last October I was hospitalized with Pulmonary Embolisms in right and left lobes. I have been on the Coumadin since, I am interested in losing weight and I see that the Garcinia cambogia is a way of dieting. is this something I can use or am I advised against. Every since I was hospitalized I have picked up so much weight.