This packet is a three-week treatment for roundworm and tapeworm. It is suitable for dogs over 6 months old. It contains 2 types of tablets; one of them against roundworms and the other against tapeworms. You would give the pink tablets on the first day, fawn tablets a week later, and then the pink tablets again a week after that. It is effective against all common species of roundworms and tapeworms found in domestic dogs in the UK.