"i was on effexor for a few months only and found it to be not particularly helpful. i had weight gain, extreme tiredness during the day and feeling &#039;blah&#039;. i decided to go off them and it took me longer to get off them than i had been taking them. the withdrawal was terrible. i had head spins that would last all day, couldn&#039;t focus, extreme dizziness if i turned too quickly etc. "