Atopica is a medication designated to treat various allergies and other dermatitis conditions in dogs and cats. The medicine needs at least two weeks to start working. After that, it may take as long as four to six weeks to show visible signs of improvement in the skin condition. After four to six weeks, the dosage should be gradually decreased to every alternate day. Atopica is an oral medication formulated as gelatin capsules filled with liquid or simply as an oral liquid. The recommended dosage is one or two times a day, an hour or two after a meal. While it's not suggested to give the medication with a meal, you can give a small amount of food or treat with it for positive reinforcement as the medicine itself is quite bitter, and your dog won't like the taste of it.