Prof Harold Charles Stewart CBE FRCP FRCS FRSE FFA DL (23 November 1906 – 7 December 2001) was a 20th-century British pharmacologist and medical author.
He followed in his father's footsteps and obtained a general degree at Cambridge University, allowing him to continue and study Medicine there, where he graduated MB ChB in 1931.
[citation needed] In the Second World War he was in the Home Guard 1939/40 and from 1941 he served as a Major in the Royal Army Service Corps.
In 1950 he became Head of Pharmacology at St Mary's Hospital Medical School in London, remaining in this role until 1974.
He was official advisor on pharmacology to the Ministry of Defence and Director General of the St John's Ambulance Association.