Your search for "Effervescent tablet" revealed the following:

Sale price £49.99 Regular price £70.00 Sale
Sale price £37.99 Regular price £50.00 Sale
Sale price £49.00 Regular price £70.00 Sale
On Sale from £28.45 Regular price £30.00 Sale
Sale price £29.78 Regular price £40.00 Sale
Sale price £23.99 Regular price £30.00 Sale
Sale price £63.97 Regular price £90.00 Sale
On Sale from £33.60 Regular price £40.00 Sale
Sale price £74.70 Regular price £90.00 Sale