Your search for "Effervescent tablet" revealed the following:

On Sale from £69.96 Regular price £70.00 Sale
Sale price £66.99 Regular price £90.00 Sale
On Sale from £71.80 Regular price £90.00 Sale
Sale price £25.95 Regular price £40.00 Sale
Sale price £69.47 Regular price £90.00 Sale
Sale price £97.48 Regular price £130.00 Sale
On Sale from £36.99 Regular price £50.00 Sale
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Sale price £29.90 Regular price £40.00 Sale
Sale price £13.99 Regular price £20.00 Sale