A few years ago I was prescribed topomax, ( topiramate) it's an anticonvulsant but also prescribed for migraines which I was struggling with, within a few days I felt dreadful, crying & miserable for no good reason (I have never suffered from depression) also quite confused, spoke to GP & I came off them, I was back to normal within a few days
This is from the contraindications,
"Suicidal ideation and behaviour have been reported in patients treated with anti-epileptic agents in several indications. A meta-analysis of randomised placebo-controlled trials of AEDs has shown a small increased risk of suicidal ideation and behaviour. The mechanism of this risk is not known and the available data do not exclude the possibility of an increased risk for topiramate"