Fluoxetine
"So I'm on 20mg taken in the morning. To treat PTSD and OCD intrusive thoughts. 
I'm on 20mg taken in the morning. I'm on my 11th day. Today I woke up feeling extremely anxious. Border of a panic attack so I took half of a 0.5 lorazepam to take the edge off. I do notice that at times my intrusive thoughts and normal ones just race going back and forth. But physically I am calm. I'm not breaking down as easily which I have noticed improvement. This is why I'm hanging in there. And giving this a chance. I do notice something that has heightened, and that would be my urge to run and be outside. It's all fed by my anxiety that's why I don't let it bother me much.
I have noticed that I am walking outdoors more often."