T47.8X6 - Underdosing of other agents primarily affecting gastrointestinal system T47.8 - Poisoning by, adverse effect of and underdosing of other agents primarily affecting gastrointestinal system T47.8X - Poisoning by, adverse effect of and underdosing of other agents primarily affecting gastrointestinal system T47.8X6 - Underdosing of other agents primarily affecting gastrointestinal system