A reference to anything that is poisonous to the fetus: Elements considered potentially fetotoxic include alcohol, morphine, cocaine, salicylates (salt or ester of salicylic acid), coumarin anticoagulants (one of a group of natural and synthetic compounds that antagonize the biosynthesis of vitamin K), sedatives, tetracyclines (group of broad-spectrum antibiotics), thiazides (diuretics primarily in the treatment of hypertension), tobacco smoke, and excessive doses of vitamin K.