Sir Derrick Melville Dunlop (3 April 1902 – 9 June 1980) was a Scottish physician and pharmacologist in British medical administration and policy-making in the late 20th century.

His father, a Major in the Royal Army Medical Corps and one of the oldest physicians to volunteer for active service, died of pneumonia at Étaples in France during the First World War.

[4] Dunlop tutored Joyce Baird, who went on to establish a Metabolic Unit and conduct laboratory and clinical research into diabetes and other endocrine disorders.

He lived most of his adult life at Bavelaw Castle near Balerno, to the south-west of Edinburgh, just south of Threipmuir Reservoir.

His granddaughter Dr Tessa Dunlop, married Vlad Pricopi, a Romanian and wrote the book To Romania With Love.