Your search for "Effervescent tablet" revealed the following:

On Sale from £41.96 Regular price £50.00 Sale
On Sale from £34.60 Regular price £50.00 Sale
Sale price £69.99 Regular price £90.00 Sale
Sale price £69.99 Regular price £90.00 Sale
Sale price £98.99 Regular price £130.00 Sale
Sale price £16.99 Regular price £25.00 Sale