I had a sore throat and felt like I have incoming flu. I took few drops under the tongue then after 30 sec swallowed it. It feels warm and spicy. Instantly I felt the congestion on my sinus lessened, within an hour the itchy throat was gone as well. I continued taking it 2x a day and I feel that it helped block the flu. The combination of the Oil of Oregano and Black Seed not only strengthened my immune system, but also helped with my allergies. I survived the flu month without fully catching it, no antibiotics or cough/flu med. I feel great. This is an amazing product!