For relief of symptoms of flu such as fever, chills, body aches and pains. Take Oscillo at the First Sign of Flu. Non-drowsy, no drug interactions Oscillococcinum (o-sill-o-cox-see-num) is Safe, natural and easy to take. Oscillo works best when taken at the first sign of flu. So make sure you have some on hand to fend off your flu symptoms at their onset.