Side effects of Naprosyn cannot be anticipated. If any develop or change in intensity, inform your doctor as soon as possible. Only your doctor can determine if it is safe for you to continue taking Naprosyn .
More common side effects of Naprosyn may include:
Abdominal pain, bruising, constipation, difficult or labored breathing, dizziness, drowsiness, headache, heartburn, itching, nausea, ringing in ears, skin eruptions, swelling due to fluid retention.
Less common or rare side effects of Naprosyn may include:
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