evidence: When most people think about consuming a vegan or vegetarian diet, their medicines are perhaps not the first thing that come to mind. However, many medicines contain excipients that are derived from animals, making it difficult for most people to avoid animal products entirely — but this might be starting to change. [...] And, although the dictionary definitions may not mention medicines, many people living a vegan or vegetarian lifestyle aim to avoid animal products wherever possible. Faiths including Judaism, Hinduism, Islam and Buddhism also teach that certain animal products should not be taken into the body, and this includes in drug form. [...] Fry says that the "vast majority" of vegan and vegetarian patients she speaks to have not thought about medicines as possibly containing animal products.