Feeling A Bit Off?® Be Prepared. Take Oscillo® at the First Sign of Flu-like Symptoms.† Oscillococcinum® (o-sill-o-cox-see-num) is safe, natural and easy to take. It has been shown in clinical studies to help reduce both the duration and the severity of flu-like symptoms.† Non-Drowsy. No Side Effects. No Drug Interactions. Works Naturally with Your Body.