Your search for "Effervescent tablet" revealed the following:

On Sale from £40.41 Regular price £50.00 Sale
Sale price £69.96 Regular price £90.00 Sale
Sale price £35.03 Regular price £40.00 Sale
Sale price £69.99 Regular price £90.00 Sale
Sale price £36.99 Regular price £50.00 Sale
On Sale from £74.90 Regular price £90.00 Sale
Sale price £79.20 Regular price £90.00 Sale
Sale price £69.92 Regular price £90.00 Sale
Sale price £69.99 Regular price £90.00 Sale
Sale price £39.75 Regular price £40.00 Sale
Sale price £79.72 Regular price £90.00 Sale
Sale price £77.84 Regular price £90.00 Sale