I've tried taking the 2 pink 500mg pills twice and each time I threw them up right after, so my third time around I was told by my nurse to take one and see if it stays down and then take the other. I did so and the one stayed down, and I tried the other some hours after. I'm unsure if the meds were affective. Does anyone have any knowledge of if the meds will treat the chlamydia still?