Your search for "Effervescent tablet" revealed the following:

Sale price £51.99 Regular price £70.00 Sale
Sale price £98.95 Regular price £130.00 Sale
Sale price £38.14 Regular price £50.00 Sale
On Sale from £25.85 Regular price £30.00 Sale
Sale price £79.95 Regular price £90.00 Sale
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Sale price £73.50 Regular price £90.00 Sale
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Sale price £184.00 Regular price £300.00 Sale
Sale price £93.45 Regular price £130.00 Sale