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Pharmaceutical and Healthcare Online Databases.
Over 100,000 approved drugs and health products.
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Level 3
R - Respiratory System
R06 - Antihistamines for Systemic Use
R06A - Antihistamines for Systemic Use
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
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