Related Terms

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Background

• Drug allergies occur when the body's immune system overreacts to substances in certain medications. These substances, called allergens, are normally harmless in individuals who do not have allergies.
• Normally, the immune system helps the body fight against disease and infection. However, if the individual is allergic to a medication, the immune system attacks the medication because it is identified as a disease-causing substance, such as bacteria.
• When the immune system launches an attack, symptoms of an allergic reaction develop. Several different types of allergic reactions may occur. Reactions may develop suddenly or be delayed. Reactions may be mild, causing hives or itchy skin. In some cases, drug allergies may be potentially life threatening. The most severe type of allergic reaction, known as anaphylaxis, may occur immediately after taking a drug. The most serious symptoms of anaphylaxis include difficulty breathing, increased heart rate, and decreased blood pressure, all of which can be fatal if left untreated.

Causes

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Common Triggers

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Risk Factors

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Other Drug Reactions

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Symptoms

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Diagnosis

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Treatment

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Integrative Therapies

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Prevention

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Author Information

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References

Natural Standard developed the above evidence-based information based on a thorough systematic review of the available scientific articles. For comprehensive information about alternative and complementary therapies on the professional level, go to www.naturalstandard.com. Selected references are listed below.

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