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Is c-nac eyedrop safe to use? How long can we use if using 2 times a day? What side effects can we expect?
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Whether an eye drop is safe depends on the condition for which it is given. Once you get cured it is better to stop it. It is better you ask the doctor who prescribed it for how long you should continue. Only lubricating drops which has no preservatives are safe for long term use.
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