William Brooke O'Shaughnessy (1809 - 1889)

Sir William Brooke O'Shaughnessy MD FRS (October 1809 – 8 January 1889) was an Irish physician famous for his wide-ranging scientific work in pharmacology, chemistry, and inventions related to telegraphy and its use in India. His medical research led to the development of intravenous therapy and introduced the therapeutic use of Cannabis sativa to Western medicine.