Pregabalin 600mg a day

Hi, I would like to know the side effects people have had on 600mg of pregabalin please ?

I am prescribed 600mg a day by pain clinic not got to 600 yet I take 400mg have been taking pregabalon for 4 years side effects became aggressive and grumpy put on weight these seem to be most common side effects pregabalon would seem to be a very good at controlling nerve pain and neuropathy