Temporarily relieves flu-like symptoms such as: body aches, headache, fever, chills, fatigue. Reduces duration and severity of flu symptoms. Non-drowsy. No drug interactions. Works naturally with your body. 6 doses. The letters HPUS indicate that this ingredient is officially included in the Homeopathic Pharmacopoeia of the United States. These uses have not been evaluated by the Food and Drug Administration. C, K, CK, and X are homeopathic dilutions.