Your search for "Effervescent tablet" revealed the following:

Sale price £26.99 Regular price £30.00 Sale
Sale price £50.85 Regular price £70.00 Sale
Sale price £69.99 Regular price £90.00 Sale
On Sale from £24.70 Regular price £30.00 Sale
On Sale from £75.89 Regular price £90.00 Sale
Sale price £96.28 Regular price £130.00 Sale
Sale price £86.68 Regular price £110.00 Sale
Sale price £278.90 Regular price £300.00 Sale
Sale price £47.99 Regular price £50.00 Sale
Sale price £30.65 Regular price £40.00 Sale
Sale price £69.99 Regular price £90.00 Sale