Your search for "Effervescent tablet" revealed the following:

On Sale from £34.95 Regular price £50.00 Sale
Sale price £28.71 Regular price £30.00 Sale
Sale price £13.99 Regular price £20.00 Sale
Sale price £13.99 Regular price £20.00 Sale
On Sale from £36.98 Regular price £50.00 Sale
Sale price £32.99 Regular price £40.00 Sale
Sale price £33.99 Regular price £40.00 Sale
Sale price £9.99 Regular price £15.00 Sale
Sale price £38.48 Regular price £50.00 Sale
Sale price £9.99 Regular price £16.00 Sale