T44.8X6 - Underdosing of centrally-acting and adrenergic-neuron-blocking agents T44.8 - Poisoning by, adverse effect of and underdosing of centrally-acting and adrenergic-neuron- blocking agents T44.8X - Poisoning by, adverse effect of and underdosing of centrally-acting and adrenergic- neuron-blocking agents T44.8X6 - Underdosing of centrally-acting and adrenergic-neuron-blocking agents