Patch Testing in Non-Immediate Drug Eruptions

Table 3 Patch Test Concentrations Used in the Literature and in Practice

*Antibiotic*	*DKG*	*De Groot*	*Barbaud*	*Others*
Penicillin G	5% Pet	Pure 1% Pet 10,000 IU Pet	Pure in powder with sodium citrate*	Romano: 5,000 IU/g Pet Bruynzeel: 20% w/w
Other penicillins	5% Pet	Pure 1% Pet	Pure in powder*	Romano: 5% Pet Bruynzeel: 20% w/w
Cephalosporins	5% Pet	20% Pet or pure 0.5% Aq	Pure in powder*	Bruynzeel: 20% w/w
Cotrimoxazole	Trimethoprim 5% Pet Sulphamethoxazole 5% Pet	Sulphonamide (not specified): 5% Pet	80 mg/mL in Aq
Tetracycline-HCl	2% Pet	3% Pet 5% Pet	Doxycycline: 20 mg/mL in Aq
Gentamicin sulphate Ciprofloxacin, ofloxacin	20% Pet 5% Pet	20% Pet	Norfloxacin: in powder from pill*
Erythromycin	1% Pet	1% Pet 5% Pet 10% Pet	Pure in powder*
Pristinamycine Carbamazepine			Pure in powder* Pure in powder*

Adapted from Brockow et al. [7]
Aq = water; DKG = German contact allergy group (test concentrations in the German practice); Pet = petrolatum (Vaseline); w/w = watery solution.
*All of these preparations were tested pure and diluted to 30% in water and in petrolatum.

ISSN: 1710-1492