Please do not use Hydroeyes 01 Eye Drop if the seal is broken prior to firsttime use Remember to wash your hands before using and make sure to shake the bottle well before each use If you wear contact lenses remove them and wait at least 15 minutes before reinserting them It may take several weeks before you notice any improvement in your dry eyes so continue using it as prescribed The most common side effects of this medication include blurred vision and a burning sensation in the eyes If your vision becomes blurred or you experience any changes in your sight refrain from driving until your vision clears up This side effect is typically shortterm but if it bothers you inform your doctor It is unlikely that other oral or injectable medications will interfere with the effectiveness of this eye drop However it is still advisable to consult your doctor if you have previously used a similar medication and had an allergic reaction If you are pregnant trying to become pregnant or currently breastfeeding do not use this medication