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Pharmaceutical and Healthcare Online Databases.
Over 100,000 approved drugs and health products.
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Level 5
R - Respiratory System
R03 - Drugs for Obstructive Airway Diseases
R03C - Adrenergics for Systemic Use
R03CA - Alpha- and beta-adrenoreceptor agonists
R03CA02 - Ephedrine
Ephedrine
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