Prinovox spot on for small dogs (0.4ml) contains as active ingredients: Imidacloprid (40mg) and Moxidectin (10mg)
Prinovox spot on for medium dogs (1.0ml) contains as active ingredients: Imidacloprid (100mg) and Moxidectin (25mg)
Prinovox spot on for large dogs (2.5ml) contains as active ingredients: Imidacloprid (250mg) and Moxidectin (62.5mg)
Prinovox spot on for extra large dogs (4.0ml) contains as active ingredients: Imidacloprid (400mg) and Moxidectin (100mg)