Your search for "Effervescent tablet" revealed the following:

Sale price £37.99 Regular price £50.00 Sale
Sale price £29.90 Regular price £40.00 Sale
Sale price £27.99 Regular price £30.00 Sale
Sale price £133.90 Regular price £150.00 Sale
Sale price £35.27 Regular price £50.00 Sale
Sale price £85.53 Regular price £90.00 Sale
Sale price £33.99 Regular price £40.00 Sale
Sale price £49.93 Regular price £70.00 Sale
Sale price £33.99 Regular price £40.00 Sale