Sources of dewormers in Europe
Praziquantel/Pyrantel/Febantel
A combination of these 3 antihelmintics.
German Wiki says: Do not use Pyrantel with Piperazine (doesn't state why though).
http://www.beaphar.com/en-gb/product/beaphar-wormclear-for-large-dogs
Indication: Platyhelminthes, Cestoda, Trematoda (Praziquantel), Oxyuris vermicularis, Ascaridida, Ancylostomatidae, Nematoda (Pyrantel), Nematoda, Cestoda, Giardia (Febantel)
Quantity: 4 tablets
Per tablet: 50 mg Praziquantel, 50 mg Pyrantel & 150 mg Febantel
Piperazine Citrate & Dichlorophen
A combination of 2 types of tablets
http://www.beaphar.com/en-gb/product/beaphar-multi-wormer-for-dogs
Indication: Ascaridida, Oxyuris vermicularis (Piperazine Citrate), Cestoda, Fungus, Germs, Microbes (Dichlorophen)
Quantity: 2 tablets
Per tablet: Piperazine citrate 375 mg (pink tablet), Dichlorophen 750 mg (fawn tablet)
Fenbendazole
Broad spectrum antihelmintic.
http://www.beaphar.com/en-gb/product/beaphar-worming-granules-for-dogs
Indication: Giardia, Nematoda, Ancylostomatidae, Trichuris trichiura, Taenia, Oxyuris vermicularis, Aelurostrongylus, Trematoda, Strongyles, Strongyloides
Quantity: 4x 3g sachets
Per sachet: 666 mg Fenbendazole
Piperazine Citrate
Yummy chocolate flavoured syrup.
http://www.beaphar.com/en-gb/product/beaphar-worming-syrup
Indication: Ascaridida, Oxyuris vermicularis
Quantity: 45 ml
Per bottle: 9.4% w/v = 4.23 g, correct me if I'm wrong.
Nitroscanate
Uhh, this one sounds dangerous ;)
http://www.beaphar.com/en-gb/product/beaphar-one-dose-wormer-large-dogs
Indication: Nematoda, Ancylostomatidae, Cestoda
Quantity: 4 tablets
Per tablet: 500 mg Nitroscanate
Source to buy:
http://www.vetuk.co.uk (they ship all over Europe, except most East European countries, most other British shops just ship to UK)