Your search for "Effervescent tablet" revealed the following:

Sale price £75.92 Regular price £90.00 Sale
Sale price £88.17 Regular price £90.00 Sale
Sale price £98.00 Regular price £130.00 Sale
Sale price £31.40 Regular price £50.00 Sale
On Sale from £25.20 Regular price £30.00 Sale
Sale price £35.99 Regular price £40.00 Sale
Sale price £62.50 Regular price £90.00 Sale
Sale price £91.70 Regular price £130.00 Sale
Sale price £75.19 Regular price £90.00 Sale
Sale price £69.64 Regular price £90.00 Sale