What Causes Severe Headache And Dizziness While Taking Paxidep And Nexipride?

i am taking one paxidep 25 tab at morning and one at bed time. one nexipride 50 at bedtime since last 3 weeks. I have severe headache and dizziness during first half of the ie from 5am to 2 to 3 pm. I am suffering from anxiety disorder and depression and had phycotic syntoms 1month ago. Pyhcotic syntoms have desapeared now. kindly tell the reason for severe headache and dizziness?