Your search for "Effervescent tablet" revealed the following:

Sale price £69.98 Regular price £90.00 Sale
Sale price £68.99 Regular price £90.00 Sale
Sale price £47.99 Regular price £50.00 Sale
On Sale from £26.47 Regular price £30.00 Sale
Sale price £19.99 Regular price £30.00 Sale
On Sale from £68.33 Regular price £90.00 Sale
Sale price £35.35 Regular price £40.00 Sale
Sale price £58.99 Regular price £70.00 Sale
Sale price £17.99 Regular price £30.00 Sale
Sale price £29.95 Regular price £40.00 Sale