Intradermal injections are usually given

Intradermal injections are usually given for allergy testing. This is because the intradermal route allows for a small amount of medication to be injected just below the skin's surface. This allows for a more accurate and localized reaction, which is important in allergy testing. Additionally, intradermal injections are not typically used for vaccination, as a larger amount of medication is needed and it is more effective to administer it through a different route. They are also not commonly used for antibiotic treatment or pain relief. These treatments typically require a larger amount of medication and are administered through different routes such as oral, intramuscular, or intravenous.