Your search for "effervescent tablet" revealed the following:

Sale price £68.99 Regular price £90.00 Sale
Sale price £36.99 Regular price £50.00 Sale
Sale price £54.99 Regular price £70.00 Sale
Sale price £53.99 Regular price £70.00 Sale
Sale price £90.94 Regular price £130.00 Sale
Sale price £48.90 Regular price £50.00 Sale
Sale price £32.29 Regular price £40.00 Sale
Sale price £79.95 Regular price £90.00 Sale
On Sale from £39.40 Regular price £40.00 Sale
Sale price £136.20 Regular price £150.00 Sale
On Sale from £57.70 Regular price £70.00 Sale
Sale price £13.99 Regular price £20.00 Sale