I started taking Cymbalta 30 mg yesterday, prescribed by my doctor after I told him that this has helped some other PCS patients. I felt very sleepy, tired and with "flat emotions" about an hour after taking the pill but it has actually made my headache go away completely!! Usually, I have headache 24/7. Why does Cymbalta help against headache? I tried to Google it, but did not find any good answer.

However, I do not like the tiredness it gives me and tonight I was extremely nauseous, but this has improved now. I'm not sure whether I should take anymore of it. Any advises? I find it strange that a "anti depressant" can help with headache. Does that mean my headache is a merely psychological cause?