Your search for "Effervescent tablet" revealed the following:

Sale price £46.99 Regular price £50.00 Sale
Sale price £86.99 Regular price £90.00 Sale
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On Sale from £69.99 Regular price £90.00 Sale
Sale price £59.99 Regular price £90.00 Sale
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Sale price £91.95 Regular price £130.00 Sale
Sale price £49.99 Regular price £70.00 Sale
Sale price £67.35 Regular price £90.00 Sale
On Sale from £36.45 Regular price £40.00 Sale