My son is 17 and started Celexa one week ago. He took 5mg for 3 d...

My son is 17 and started Celexa one week ago. He took 5mg for 3 days them 10 mg until today. He is nervous, anxious, nausea, can't sit still, fells like he has to go to the bathroom (no 2 all the time), and is on the verge of a full panic attack. The symptoms are always worse in the morning. He takes the meds in the morning and can't eat or drink because he feels so bad. (I thought eating might help) He has not been eating breakfast or lunch because of it. He stared taking 5mg this morning per the doctors request. Will this help? I would appreciate any input.