The time it takes for eye drops to take effect depends on the formula you’re using and what condition you’re treating. As a general guideline:
Artificial tears work almost immediately, within 1-2 minutes.
Allergy eye drops range from 30 minutes to up to 12 hours.
Prescription eye drops can take a few hours or up to several weeks for noticeable improvement.
Antibiotic eye drops start working within 24-48 hours.
Glaucoma eye drops can vary depending on their formula. […]
