Your search for "Effervescent tablet" revealed the following:

Sale price £69.69 Regular price £90.00 Sale
Sale price £120.77 Regular price £150.00 Sale
On Sale from £25.88 Regular price £30.00 Sale
Sale price £88.84 Regular price £90.00 Sale
Sale price £69.20 Regular price £90.00 Sale
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On Sale from £41.80 Regular price £50.00 Sale
On Sale from £89.60 Regular price £130.00 Sale
Sale price £69.43 Regular price £90.00 Sale
Sale price £154.93 Regular price £200.00 Sale
On Sale from £62.49 Regular price £90.00 Sale
Sale price £24.99 Regular price £30.00 Sale