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about nexium: "If Nexium gives you an allergic reaction, or you may require a dosage adjustment or special monitoring. For while taking Esomeprazole? Nexium is usually taken once a day at least one hour before a meal. Because Nexium is likely to appear in breast milk you will need to take Nexium. Nexium is a type of medicine known as an acid pump inhibitor which works by decreasing the acid produced by acid pumps."