Comment by tialaramex

It's not at all unusual for drugs to have effects similar to the thing they're used to treat.

The anti-emetic I needed to take for chemo (chemotherapy is literally poison, your body will quickly figure out that you're being poisoned and, despite the fact that the poison was injected into your veins, throw up to try to remove it, so, you need an anti-emetic or you'll have a bad time each session) has "Nausea, vomiting" on its list of possible side effects. It also has a long list of really nasty psyc effects, so since taking it after chemo isn't mandatory I just didn't, most people take it for a few hours or a day, I just didn't, which was not fun but to my mind the risk wasn't worth it. [Yes I'm fine now, chemotherapy works]

Even more hilariously I read a friend's Morning After pill patient info while she was busy taking it, and almost every symptoms of early pregnancy is on the side effects list - basically the only thing they're not saying you might have despite this pill is a baby. Vomiting, cramps, dizziness and headaches, bleeding, sore nipples - pretty much everything except the newborn human in nine months was on the list.