Anaphylaxis Causes and Triggers: Foods, Medications, Insect Stings
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Risk Factors for Anaphylaxis
A number of factors make it more likely that you’ll experience anaphylaxis, or an anaphylactic reaction to a specific allergen.
You’re more likely to experience anaphylactic reactions generally (but possibly not in response to all allergens) if you have a genetic predisposition to allergies and asthma, known as atopy.
If you’re taking a beta blocker or ACE inhibitor drug, any anaphylactic reaction you have to an allergen may be more severe.
In some situations, such as reactions to drugs like penicillin, the longer it’s been since your last exposure to an allergen, the less likely it is that you’ll have an anaphylactic reaction if exposed again.
When it comes to allergic reactions to drugs, oral drugs are less likely to cause anaphylaxis than drugs administered in a different way (injected, infused by IV, or delivered rectally or vaginally).
Drugs that you receive intermittently, rather than on a regular basis, are also more likely to cause anaphylaxis.
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