Your search for "Effervescent tablet" revealed the following:

On Sale from £41.50 Regular price £50.00 Sale
Sale price £32.85 Regular price £40.00 Sale
Sale price £43.99 Regular price £50.00 Sale
Sale price £89.99 Regular price £130.00 Sale
Sale price £89.98 Regular price £90.00 Sale
Sale price £32.89 Regular price £40.00 Sale
Sale price £169.90 Regular price £200.00 Sale
Sale price £47.84 Regular price £50.00 Sale
Sale price £89.95 Regular price £130.00 Sale
Sale price £26.99 Regular price £30.00 Sale