Fluoxetine
"I was reluctant to begin fluoxetine because I'd had a terrible experience when my GP started me on 50mg of sertraline. Eventually I ended up going private and the psych prescribed me prozac but starting on a really low dose of 10mg for a week, then 20mg for 4 weeks and now 40mg for the last month. 

It's been great. Really cut down my intrusive thoughts to basically nothing, concentration is better, I'm enjoying life again! This is also due to a good therapist but the medication has definitely helped. Main side effect was sleepiness but having suffered with insomnia on and off for years, it's been great not dreading bedtime anymore. In the first couple of weeks of a new dose, I'd have a bit of brain fog but other than that, it's been great!"