Oscillococcinum works naturally with your body to temporarily relieve flu-like symptoms, such as fatigue, headache, body aches, chills and fever. Oscillo has been shown in clinical studies to help reduce both the duration and severity of flu-like symptoms. It does not cause drowsiness or interact with other medications. Oscillococcinum's sweet-tasting pellets dissolve quickly under the tongue; no water, chewing or swallowing is required. Recommended for everyone ages 2 and up, Oscillococcinum works best when taken at the first sign of flu-like symptoms.