Your search for "Effervescent tablet" revealed the following:

Sale price £67.99 Regular price £70.00 Sale
On Sale from £28.97 Regular price £50.00 Sale
Sale price £96.99 Regular price £120.00 Sale
Sale price £14.99 Regular price £30.00 Sale
Sale price £24.49 Regular price £30.00 Sale
Sale price £9.99 Regular price £20.00 Sale
On Sale from £23.08 Regular price £30.00 Sale
Sale price £46.10 Regular price £70.00 Sale