I have seemed to manage to get all my food items vegan but I can not get vegan prescription medicines

I do not want to eat dairy or meat anymore because they are testing mRNA vaccines on cows and have a end date coming up later this year

If I have a single pill evey day made from ingredients derived from cows milk where the cows were mRNA injected is that just as dangetous as drinking a glass of cows mill every day in terms of mRNA drug exposure?

I am trying to decide what to do?