T44.6X4 - Poisoning by alpha-adrenoreceptor antagonists, undetermined T44.6 - Poisoning by, adverse effect of and underdosing of alpha-adrenoreceptor antagonists T44.6X - Poisoning by, adverse effect of and underdosing of alpha-adrenoreceptor antagonists T44.6X4 - Poisoning by alpha-adrenoreceptor antagonists, undetermined