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Pharmaceutical and Healthcare Online Databases.
Over 100,000 approved drugs and health products.
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Level 3
C - Cardiovascular System
C02 - Antihypertensives
C02A - Antiadrenergic Agents, Centrally Acting
C02AA - Rauwolfia alkaloids
C02AB - Methyldopa
C02AC - Imidazoline receptor agonists
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