Your search for "Effervescent tablet" revealed the following:

Sale price £79.95 Regular price £90.00 Sale
Sale price £14.99 Regular price £22.00 Sale
Sale price £156.70 Regular price £200.00 Sale
Sale price £77.99 Regular price £90.00 Sale
Sale price £52.99 Regular price £70.00 Sale
Sale price £53.99 Regular price £70.00 Sale
Sale price £198.89 Regular price £300.00 Sale
Sale price £39.19 Regular price £50.00 Sale
Sale price £34.43 Regular price £40.00 Sale
Sale price £86.09 Regular price £110.00 Sale
Sale price £48.83 Regular price £70.00 Sale