I was having very bad depression since 3-4 days. I took serta 25 mg tablet. I have taken only 1 tablet and am having throbbing pulsing headache since last night. I was not able to lie down or sleep yesterday. Today I am not able to do any work. Neither was I able to eat. I even had to miss my yoga class. It is like bricks are kept on my head. It's horrible. I have been taking psychiatrist medicines since february 2016 never have I experienced this. I know psychiatrist medicines have side effects and I have experienced them too but never have I experienced this.