Stronghold is a colourless to yellow ready to use solution of selamectin. Stronghold is presented in a single use plastic tube for cutaneous (spot-on) administration to dogs and cats. For the treatment and prevention of flea infestations and roundworms for one month following a single administration. Stronghold is also ovicidal for 3 weeks after administration.For use as part of a treatment strategy for flea allergy dermatitis and through its ovicidal and larvicidal action may aid in the control of existing environmental flea infestations in areas to which the animal has access. For the treatment of ear mites (Otodectes cynotis). Also for the prevention of heartworm disease caused by Dirofilaria immitis with monthly administration.Weight RangesKittens & Puppies weighing ¤ 2.5 kg - 1 tube of Stronghold 15 mg (Rose coloured top)Cats weighing 2.6 7.5 kg - 1 tube of Stronghold 45 mg (Blue coloured top)Cats weighing 7.6 - 10.0 kg - 1 tube of Stronghold 60 mg (Taupe coloured top)Dogs weighing 2.6 5.0 kg - 1 tube of Stronghold 30 mg (Violet coloured top)Dogs weighing 5.1 10.0 kg - 1 tube of Stronghold 60 mg (Brown coloured top)Dogs weighing 10.1 20.0 kg - 1 tube of Stronghold 120 mg (Red coloured top)Dogs weighing 20.1 40.0 kg - 1 tube of Stronghold 240 mg (Green coloured top)Dogs weighing 40.1 - 60.0 kg - 1 tube of Stronghold 360 mg (Plum coloured top)Dogs weighing > 60.0 kg - Appropriate combination of tubes

£39.43