I have a highly allergy at my eyes, and the mostly in the Left eye, i used Pred-mild but i didn't feel good then the Dr change it to Olopat Drop it was the same, then stopped and keep using Refresh Tears due to the dryness too (for a month) but itching and irritating get increased 2 days ago it became v. red the doctor gave me Pred-Fort Drop
I used it today but i have a headache then i remembered that i've use it once 2 years ago and i had the same headache (it's from the eyes part from the head).
Note : My left eye keep tearing due to dryness & allergy (i don't have a problem in my Sinusitis) I am looking forward to receive from you
Thanks for your question
Pred forte eye drops can cause increase in intraocular pressure which can cause headache. I would recommend you to visit your eye doctor to measure the intraocular pressure.