Not sure if they have stopped selling these antibiotics in Tenerife ,they have in Lanzarote,without a presciption,but i bought several packs in Costa Adeje at just under 4 euros a pack of 24,(April 07)
Yep they stopped selling them without prescription in 2007 as we went in November and wife had terrible toothache but they said they had stopped this year, previous years you could always buy them.