BC Powders have been arround along time. I purchased the box of eighteen powders. They do work very well. If you have headaches, bodyaches, or fever. They come with each individual powder pack. It is very effective pain relief. I have to eat something before I take them but they are fast acting. You cannot exceed four powders in a twenty four hour period. If you are pregnant, you should not use them and consult your doctor. You can stir the contents of one powder pack into a glass of water or juice. You stir very well and drink. Each powder pack contains fifty five mg's of potassium. This cannot be taken if you are on certain medications and you should consult with a physician or pharmacist before using. It is not advised to drink over three alcoholic beverages as asprin can cause bleeding. I would recommend this product for effective pain relief. It does temporarily reduce fever but children should not use this with chicken pox or the flu because of Reye's syndrome, without consulting a doctor.