I would also like to add a point about the effects of these hormonal contraceptions while on anti-depressants/anti-anxiety medications.
An acquaintance of mine was on Zoloft for her anxiety. She went on the birth control pill. About a week after being on the pill, she became really depressed and withdrawn. Her doctors thought maybe the Zoloft wasn't working as well as it had been so they put her on a higher dose. It wasn't until she attempted suicide the doctors realized her depression was caused by the birth control pills reacting negatively with the chemicals in the Zoloft. As we all know, an added dose of estrogen makes us more sensitive (hence PMS since it occurs when estrogen levels are the highest). The high levels of estrogen in her BC pills were not reacting well with the mood enhancing drugs she was taking. This doesn't happen all the time but it can be a factor. My roommate from two years ago was on Zoloft and BC pills at the same time and she was fine. It all depends on your biochemistry. I would assume though that the women who are taking this morning after pill are not on any type of birth control pills. Because of this, if they are taking any anti-depressants, they would not know how they'll react to a pill with a high dose of hormones. The morning after pill is basically the birth control pill but with A LOT more estrogen. Imagine if a woman who is on these anti-depressants had the same effect as the acquaintance of mine but, since the morning-after pill has more estrogen, it affected her 10 times more.
If these do become OTC, there needs to be a HUGE warning that goes out to women who are on anti-depressants. Not one of those tiny, fine-print things that you'll see on the bottle.