I am happy with how quickly all the cell salts show improvement in symptoms. I gave #11 for stomach flu (vomiting). It stopped the stomach cramps within 15 minutes.
I did some research on cell salts prior to making my purchase at Jackson's. This bottle (2000 pellets) is the best price for the highest quality that I found available for purchase in the US. Jackson's has a good reputation among scores of homeopaths and folks within the alternative medicine commmunity.