Your search for "Effervescent tablet" revealed the following:

Sale price £87.99 Regular price £90.00 Sale
Sale price £33.99 Regular price £40.00 Sale
Sale price £34.12 Regular price £40.00 Sale
Sale price £143.15 Regular price £200.00 Sale
Sale price £34.99 Regular price £50.00 Sale
On Sale from £49.98 Regular price £50.00 Sale
Sale price £52.99 Regular price £70.00 Sale
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Sale price £52.92 Regular price £70.00 Sale
On Sale from £89.48 Regular price £130.00 Sale