Your search for "Effervescent tablet" revealed the following:

Sale price £77.99 Regular price £90.00 Sale
On Sale from £70.66 Regular price £90.00 Sale
On Sale from £49.69 Regular price £50.00 Sale
Sale price £59.85 Regular price £90.00 Sale
Sale price £62.40 Regular price £90.00 Sale
On Sale from £38.99 Regular price £50.00 Sale
Sale price £34.99 Regular price £50.00 Sale
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Sale price £36.95 Regular price £50.00 Sale
Sale price £98.95 Regular price £110.00 Sale