birth control
"I developed terrible depression taking this medication. The first month and a half were fine, even energizing. I actually slept less and felt more alert the first few weeks.The first two nights I took the pill I only slept 4 hours, and woke up sweating and then couldn't sleep the rest of the night. This side effect went away, and then all was pretty normal for awhile. Then I felt myself slowly slipping into a funk. It started with a negative attitude towards things I used to enjoy, and progressed into terrible depression.  I suspected the pill, and the day after the 3 months ended, I felt immediately better and happy again. It was like day and night. I went back to Nuvaring after this experience."