T44.4X6 - Underdosing of predominantly alpha-adrenoreceptor agonists T44.4 - Poisoning by, adverse effect of and underdosing of predominantly alpha-adrenoreceptor agonists T44.4X - Poisoning by, adverse effect of and underdosing of predominantly alpha-adrenoreceptor agonists T44.4X6 - Underdosing of predominantly alpha-adrenoreceptor agonists