Do you have a higher risk of deep vein thrombosis and/or pulmonary embolism if you smoke cigarettes and chew tobacco?

Yes: Some of the 200 poisons in cigarette smoke do increase blood clotting (why do we do this to ourselves?). To have enough clotting to cause a DVT or pulmonary embolism, usually there is also another risk factor like trauma, immobilization (walk the aisle frequently on long flights and bus trips), certain diseases, or birth control pills. Take care of yourself and your sensitive lungs please.

Higher.: Although smoking cigarettes , nicotine and chewing tobacco may have many side effects and are associated with many bad things, long term smoking can lead to chronic lung disease which can then lead to thickened blood which can lead to clotting, DVT and even pulmonary embolism.

Yes, slightly higher: Both clinical and basic research have linked smoking to abnormalities of coagulation, fibrinolysis and to venous thromboembolic disease. Several potential mechanisms involving inflammation, fibrinogen synthesis, clotting factors, and impaired fibrinolysis have been suggested as possible links. Even cdc lists smoking as a risk factor for dvt. http://www.cdc.gov/features/thrombosis/?mobile=nocontent.