Feminax Express costs up to £4.50, at Boots, Tesco and Superdrug, while Asda had it on offer at £3 for 16 tablets. Feminax Express costs around £4.50 for 16 tablets, while Nurofen Express Period Pain will set you back about £4 for a 16-pack. But own-brand packets of ibuprofen at Tesco and...