Abstract

Our article on oral anticoagulants (March 31, 1972, p. 25) included tables of causes of increased and of decreased sensitivity to these drugs. To make this information more immediately accessible at the point of prescribing, we have reprinted these tables as a leaflet. A copy is enclosed with this issue. A small correction has been made: phenytoin is now not mentioned, for it may increase or decrease sensitivity to the drugs.