Your search for "effervescent tablet" revealed the following:

On Sale from £89.84 Regular price £130.00 Sale
Sale price £69.96 Regular price £90.00 Sale
Sale price £69.47 Regular price £90.00 Sale
Sale price £114.40 Regular price £130.00 Sale
Sale price £26.99 Regular price £30.00 Sale
Sale price £160.26 Regular price £200.00 Sale
Sale price £29.90 Regular price £40.00 Sale
Sale price £89.98 Regular price £90.00 Sale
Sale price £334.97 Regular price £400.00 Sale
On Sale from £27.73 Regular price £30.00 Sale
Sale price £32.29 Regular price £40.00 Sale