Your search for "Effervescent tablet" revealed the following:

Sale price £98.25 Regular price £130.00 Sale
Sale price £49.95 Regular price £70.00 Sale
On Sale from £34.72 Regular price £40.00 Sale
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Sale price £46.05 Regular price £50.00 Sale
On Sale from £79.89 Regular price £95.00 Sale
Sale price £49.99 Regular price £70.00 Sale
Sale price £108.42 Regular price £150.00 Sale
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On Sale from £34.41 Regular price £40.00 Sale
Sale price £144.50 Regular price £200.00 Sale