How much does smoking increase the risk of cardiovascular incidents in women on contraceptives, as compared to non-smokers who are on contraceptives?

It still does: Newer BC pills have improved for smokers risks, but it is still much higher than for non-smokers. The amounts are online but take mucho space. Here's a link w/ deeper links too. http://www.healthguideinfo.com/birth-control/p100649/ It's always good to reduce or quit smoking, so consider trying. There is lots of help out there. Best wishes

Birth control: Smoking cigarettes during the use of oral contraceptives has been found to greatly increase the risk of Stroke and heart attack, The risk increases with age and with heavy smoking (15 or more cigarettes per day) and is quite marked in women over 35 years of age.

Variable: the greatest risk with this combination is the increase in blood clotting which oral contraceptives can cause, compounded by smoking. This may result in deep venous thrombosis - blood clots in the legs - and pulmonary embolism - one of these clots traveling through the heart to the lungs, which can cause death and severe illness. The risk is two to three times higher in women who smoke.

Smoking /heart: Smoking or even secondary inhalation of tobacco smoke can increase changes in blood vessel diameter which can lead to increases in coronary narrowing, after which both strokes and heart attacks are more likely. It is also possible statistically to occur with oral contraceptives, as the warnings indicate. There is no positive effect in anyone by smoking, so stopping is the best advice.

Uncertain: The risk of cardiovascular (heart) disease incidents increases after women's child bearing years, so little information is known about effects of oral contraceptives (OCP's). Combinations of smoking & oral contraceptives during childbearing years can increase blood clots & should be avoided. Hormone replacement therapy, smoking, & heart disease is a different question. Either way don't smoke.

Several-fold but...: Smoking strongly increases risk of heart attack & stroke for women on oral contraceptives (OC's) (and for women not on OC's!). It may increase risk 6-7 fold in those under 35 but the risk is still small. Once women reach 35 the risk becomes so much greater that it's recommended those over 35 who smoke shouldn't use OC's. See http://www.coxhealth.com/body.cfm?id=5453 Smoking is hazardous for all!