How long does it take for Patanol to start working?!

If the reason you are taking the eye drop is for allergies, and the problem you are having is NOT allergies, it may not help much if at all.

I know for me, if an over the counter or prescription medication or eye drop for my seasonal allergies, is not working in at least two to three days, I will either need something else, or the problem I am using it for, isn't what I or the doctor thinks it is. If you are not having any relief in say a week, you need to have the doctor re-examine your eyes to see if there is something else going on with your eyes, other than suspected allergies.