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R06A - ANTIHISTAMINES FOR SYSTEMIC USE
Hierarchy:
R - RESPIRATORY SYSTEM
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R06 - ANTIHISTAMINES FOR SYSTEMIC USE
Level 4 Subgroups (7)
R06AA - Aminoalkyl ethers
R06AB - Substituted alkylamines
R06AC - Substituted ethylene diamines
R06AD - Phenothiazine derivatives
R06AE - Piperazine derivatives
R06AK - Combinations of antihistamines
R06AX - Other antihistamines for systemic use