How does the presence of an allergic reaction differ from typical side effects?

The distinction between allergic reactions and typical side effects is crucial in pharmacology. In cases of an allergic reaction, the immune system mistakenly identifies a substance as harmful and mounts a response against it. This can lead to symptoms such as hives, swelling, or even anaphylaxis in severe cases. Due to the potential severity and unpredictability of allergic reactions, it often necessitates the immediate withdrawal of the medication to prevent further complications or worsening of the reaction.

In contrast, side effects are usually dose-dependent and predictable based on the pharmacological action of the drug. They are common occurrences that many patients may experience without significant danger. While side effects can range in severity, they do not inherently require discontinuation of therapy unless they become intolerable or harmful.

This understanding highlights why the withdrawal of medication is more critical in the event of an allergic reaction compared to side effects, which might be managed through dose adjustment or monitoring rather than outright cessation of the medication.