Please refrain from using Nano Tears 005 Eye Drop if the bottle seal is broken before your initial use Prior to application remember to wash your hands and give the bottle a good shake If you wear contact lenses be sure to remove them and wait at least 15 minutes before reinserting them It may take a few weeks before you notice an improvement in your dry eyes so continue using the eye drops 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 other changes in your eyesight refrain from driving until your vision clears up This side effect is usually temporary but if it persists and 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 always advisable to consult with your doctor if you have previously used a similar medication and experienced an allergic reaction If you are pregnant attempting to conceive or breastfeeding it is important to avoid using this medication