T47.0X1 - Poisoning by histamine H2-receptor blockers, accidental (unintentional) T47.0 - Poisoning by, adverse effect of and underdosing of histamine H2-receptor blockers T47.0X - Poisoning by, adverse effect of and underdosing of histamine H2-receptor blockers T47.0X1 - Poisoning by histamine H2-receptor blockers, accidental (unintentional)