It is always best to discuss your pet's medical treatment with your veterinarian. However, Bravecto has a high margin of safety. In safety studies, Bravecto was tested in healthy dogs and puppies at up to 5 times the recommended dose at 8-week intervals for 3 treatments.1 Therefore, no adverse effects are expected if dogs are inadvertently treated twice with the recommended dose within 12 weeks, but please contact your veterinarian.