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Oral Contraceptives May Not Work In Obese Women

Posted Jul 16 2009 12:00am

Here’s is something to seriously ponder and discuss with your doctor if you are obese and using oral contraceptives. A new study shows that oral contraceptives may take longer to work in obese women and may not be as effective. A study at the Oregon Health and Science University found that it took an average of about five days for the drugs to achieve their maximum concentration in women of normal weight, an average of 10 days for obese women, and even longer than that for some obese individuals. The test population was healthy women aged 18-35.  This delay in reaching a critical drug concentration raises questions about how well oral contraceptives may work for obese women. This is a great concern as 30% of the U.S. population is obese. More studies will be done to determine if other methods of contraception would be more effective for the obese. The researchers are suggesting that for now, obese women using oral contraceptives may want to use a back up method as well.

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