Strongid P Paste for horses contains pyrantel embonate pyrantel, a wormer effective against adult large and small redworms, ascarids, pinworms and at a double dose, some tapeworms. It does not kill worm eggs, larvae, lungworms or bots. Tapeworms are carried by forage mites which eat the tapeworm eggs and are swallowed in turn by the grazing horses. The tapeworm dose is TWICE that needed for other worms ie two syringes for an average horse. It may be given twice a year at beginning and end of the grazing season. Normal roundworm dosage needs to be repeated every 4 -6 weeks. One tube will treat 600kg but two tubes are needed to treat for tapeworm.