Oral contraceptives that combine two key hormones, a type widely used by Americans, increased women's rate of taking antidepressants by 23 percent. Among teens using these contraceptives, the rate nearly doubled.
More than one million women were tracked over a 10-year period through a national database. The participants, all aged between 15 and 34 years old, did not suffer from major mental health disorders.
According to the study, among 15 to 19 year-old females, those taking oral combination birth control pills were diagnosed with depression at a 70 percent higher rate than non-users. The patch and vaginal rings posed a particular risk to young women, tripling the rate of depression.
Progestin-only birth control created even higher rates of depression and anti-depressant use. Oral forms of the drug doubled the use of antidepressants among young women. Intrauterine devices (IUDs) like Mirena, nearly tripled the number of both depression diagnoses and anti-depressant use among the study's younger participants.
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