Market penetration of new drugsBMJ 1994; 308 doi: https://doi.org/10.1136/bmj.308.6925.416 (Published 05 February 1994) Cite this as: BMJ 1994;308:416
- H McGavock,
- G D Johnston,
- C H Webb
- Drug Utilisation Research Unit, Department of Therapeutics and Pharmacology, Queen's University of Belfast, Belfast BT9 7BL.
EDITOR, - Three letters1 comment on our article on the market penetration of new drugs in Northern Ireland.2 J P Griffin attacks our article as flawed in its conclusions without revealing the flaws.1 We did not state that it was “always the first medicine in the field which continues to be…the market leader.” We did not advocate that the search for better products in the same therapeutic class should not be pursued. We …