Short answer: Section 2 of the Xalatan label says that if one dose is missed, treatment should continue with the next dose as normal. The dose is one drop in the affected eye or eyes once daily in the evening, and the label says it should not be used more than once a day.
| Situation | What the label says |
|---|---|
| Schedule | One drop in the affected eye(s) once daily in the evening (2) |
| Missed one dose | Continue with the next dose as normal (2) |
| Most per day | Not more than once daily (2) |
| Why not more often | More than once daily may lower the pressure-lowering effect (2) |
Section 2 says the recommended dosage is one drop in the affected eye(s) once daily in the evening, and that if one dose is missed, treatment should continue with the next dose as normal.
Example: you forgot Tuesday evening's drop and notice on Wednesday morning. Under the label you would use Wednesday evening's drop as usual.
Section 2 says Xalatan should not be used more than once daily, because using these prostaglandin drops more than once a day may decrease the eye-pressure-lowering effect or even raise eye pressure.
Section 2 says pressure starts to drop about 3 to 4 hours after a dose, with the maximum effect after 8 to 12 hours.
This page summarizes FDA labeling. It is not personalized medical advice; confirm what to do with your prescriber or pharmacist.