Some side effects with NuvaRing, while occurring infrequently, are potentially serious and should be reported to your healthcare provider. These include but are not limited to:
Signs of a blood clot in the leg, such as:
Pain in the calf
Leg cramps
Leg or foot swelling
Signs of a blood clot in the lung, such as:
Shortness of breath
Sharp chest pain
Coughing up blood
Chest pain or heaviness, which may be signs of a heart attack
Sudden loss of vision or vision changes, which can be a sign of a blood clot in the eye