Side effect: allergic reactions
Allergic reactions to insulin are a rare occurrence. The first clue that these are occurring is if the insulin user experiences redness, swelling or itching at the injection site, soon after commencing insulin treatment. Sometimes, the site of injection can become lumpy within a few hours of insulin administration.
The reactions could occur as a response to a component in the insulin liquid, such as a preservative or a factor that seeks to delay the absorption of insulin, such as zinc.
Sometimes, using antihistamine tablets to suppress the immune system can help reduce the reaction, as can switching to a different insulin.
If these measures don’t work, review by an allergy specialist is advised for additional investigation.
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