Box 22. Recommendation.
| DPT is recommended once other allergy diagnostic tests have been completed, after an individual risk–benefit analysis has been carried out. |
| If possible, the patient should be exposed to the suspected drug in its original formulation. |
| In justified exceptional cases, DPT can be performed even without prior diagnostic testing if urgently required for the purposes of administering a drug. |
| In the case of severe immediate reactions that lie many years in the past and one-off normal provocation testing, a re-evaluation (repetition of skin and in vitro tests, followed by provocation tests if normal) may be considered in individual cases with a high degree of suspicion. |