Veganism is the veganes way of life. Veganism is also defined as a struggle for social justice for animal liberation. Animals are oppressed and vegans campaign against their oppression.
A vegan person aims to exclude, as far as possible, all forms of exploitation and cruelty towards animals for food, clothing or any other purpose. She has a plant-based diet avoiding all foods of animal origin (mammals, fish, crustaceans, insects), or their secretions (dairy products, eggs, honey). It also does not use materials of animal origin (wool, silk, bee wax, bone, ivory, horns), products tested on animals and does not participate in activities that involve the use of animals for recreation or entertainment (zoo, circus, aquarium, bullfight, hunting, photo with wild animal, etc.).
Living in a world that is not vegan, it is virtually impossible to have drugs that have not been tested on animals. I do not recommend that you avoid the medications that have been prescribed by your doctor. You can ask your doctor or pharmacist to provide you, if possible, with medicines which have not been tested on animals and which do not contain products of animal origin such as gelatin or lactose.