Table 3.
Frequently used medicaments that suppress skin tests together with the duration for which they should be discontinued prior to testing are listed, adapted from [24, 25]
| Drug group | Suppression | Period of discontinuation |
|---|---|---|
| H1 Antihistamine 1 st generation | +++ | >3 days |
| H1 Antihistamine new generation | +++ | >7 days |
| H2 Antihistamine | −/+ | 2 days |
| Ketotifen (mast cell stabilizer) | +++ | >5 days |
| Topical glucocorticosteroid (GCS) in the test area >4 weeks | + | >1 week |
| Systemic short-term GCS | ||
| <50 mg prednisolone | − | 3 days |
| >50 mg prednisolone | −/(+) | >1 week |
| Systemic long-term GCS | ||
| <10 mg prednisolone | − | 0 |
| >10 mg prednisolone | −/+ | >3 weeks |
| Benzodiazepines | +++ | >7 days |
| Omalizumab | +++ | 4–8 weeks |
| Tricyclic antidepressants | +++ | >14 days |
| Promethazine (neuroleptic) | ++ | >5 days |