Cupronickel or copper-nickel is an alloy of copper that contains nickel and strengthening elements, such as iron and manganese.
Despite the low risk of side effects, it's important to take caution when using Oscillococcinum in treatment of the flu. Because the flu virus can lead to complications like pneumonia (a potentially life-threatening condition), you should seek medical attention if you experience flu symptoms such as coughing, sore throat, muscle aches, fatigue, headache, and high fever.
Less serious side effects may include: 1  stomach pain, nausea, vomiting; 2  vaginal itching or discharge; 3  headache; or. 4  swollen, black, or hairy tongue.moxicillin in Detail-Patient Information: Side Effects. Get emergency medical help if you have any of these signs of an allergic reaction: hives; difficulty breathing; swelling of your face, lips, tongue, or throat.