6.8SPC, this really isn't a dumb question. I asked the same thing when I had to go on HRT for menopause. There were all these scary studies coming out at that time about the dangers of HRT. I'm young and I wanted to know what happens when you stay on them for long lengths of time with out cycling off them. So FYI, hope this helps answer your question...
Just like with any medications BC pills have side effects, but like mentioned above it is a very low dose. It has been around for 40 yrs, so they have to dosage pretty much down by now... but there is always some risk.
According to Harvard University the sides are....
**broken link removed**
What are the side effects?
Side effects vary from woman to woman and often depend on the type of pill you are taking. Some women report bleeding irregularities, especially during the first three months of taking the pill. This usually will resolve itself after a few months. Taking the pill at the same time every day helps to decrease the risk of missing pills as well as to decrease the risk of irregular bleeding. Other possible side effects include nausea, breast tenderness, and mood swings. Some women report a slight increase in weight, 3-4 pounds over a year, though newer formulation of pills have made this less of a problem. If you find you are still experiencing side effects from the pill after three months, contact your clinician. Changing your pill may help to relieve your side effects.
What are the risks of taking the pill?
Abnormal blood clotting is the primary risk in taking oral contraceptives. In a small number of women, the estrogen in the pill changes the way in which the body forms blood clots. Blood clots among healthy women with no risk factors are rare. If while taking the pill, you experience any of the following, you should seek medical care immediately and inform them you are taking hormonal contraception:
A - abdominal pain (severe, sudden onset)
C - chest pain, shortness of breath, coughing up blood
H - headache (severe, unrelenting), numbness in arms and/or legs
E - eye problems (sudden blurred vision, loss of vision, flashing lights)
S - severe leg pain in calf or thigh