Your search for "Effervescent tablet" revealed the following:

On Sale from £27.97 Regular price £30.00 Sale
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On Sale from £37.98 Regular price £40.00 Sale
Sale price £157.98 Regular price £200.00 Sale
Sale price £65.25 Regular price £70.00 Sale
Sale price £53.99 Regular price £70.00 Sale
Sale price £67.99 Regular price £90.00 Sale
On Sale from £69.99 Regular price £90.00 Sale
Sale price £92.79 Regular price £130.00 Sale
Sale price £69.98 Regular price £90.00 Sale