Table 5. A list of test substances and their recommended maximum test concentrations.
| Test substance | Maximum skin prick test concentration | Maximum IDT concentration | References |
|---|---|---|---|
| Benzylpenicillin | 10,000 IU/mL | 10,000 IU/mL | [26] |
| Amoxicillin | 20 mg/mL | 20 mg/mL | [114, 116] |
| Benzylpenicilloyl octa-L-lysine | 8.6 × 10–5 mol/L | 8.6 × 10–5 mol/L | [19] |
| Sodium benzylpenilloate | 1.5 × 10–3 mol/L | 1.5 × 10–3 mol/L | [19] |
| Ampicillin | 20 mg/mL | 20 mg/mL | [114, 116] |
| Aztreonam | 2 mg/mL | 2 mg/mL | [50, 67] |
| Cephalosporins | 2 mg/mL Cefepime 20 mg/mL for cefalexin, cefaclor, cefadroxil, cefuroxime, ceftriaxone, cefotaxime, ceftazidime, cefazolin In the case of a positive reaction, the dose should be reduced by one or two steps of 10 |
2 mg/mL Cefepime 20 mg/mL for cefalexin, cefadroxil, cefuroxime, ceftriaxone, cefotaxime, ceftazidime, cefazolin |
Combined from [25, 130, 131] |
| Ertapenem | 1 mg/mL | 1 mg/mL | [67] |
| Imipenem/cilastatin | 0.5 mg/mL | 0.5 mg/mL | [64, 67] |
| Meropenem | 1 mg/mL | 1 mg/mL | [65, 67] |
| Piperacillin | 20 mg/m | 20 mg/mL | [67] |
IDT = intradermal test, IU = international units.