Your search for "Effervescent tablet" revealed the following:

Sale price £48.89 Regular price £60.00 Sale
Sale price £67.80 Regular price £90.00 Sale
Sale price £69.77 Regular price £90.00 Sale
Sale price £66.32 Regular price £90.00 Sale
Sale price £96.30 Regular price £130.00 Sale
Sale price £22.56 Regular price £30.00 Sale
On Sale from £39.76 Regular price £50.00 Sale
Sale price £104.99 Regular price £150.00 Sale
Sale price £49.20 Regular price £50.00 Sale