Designed to be used in conjunction with Original Sambucol, Sambucol Black Elderberry Cold & Flu Relief is a homeopathic preparation that will help you feel better while you are getting better. Sambucol Cold & Flu is a homeopathic remedy specially designed for fast, temporary relief from: nasal and sinus congestion, fever and chills, coughing, fatigue, stuffiness, flu symptoms, cold symptoms, and headache and achiness.