I have been taking 250mg of venlafaxine for apporx 9 months. Since my return to work I have been suffering with an on going sore throat cough hearing infection and eye infections. Nothing I do seems to make it go away. I had one course of anti biotics but I still feel so poorly.Can the venlafaxine cause low immunity? I would be very gratefull as so many infections is actually making me feel more depressed.