Benzylpenicilloyl-polylysine

Adjunct to assessing the risk of penicillin hypersensitivity (elicits type 1 urticarial reactions by Immunoglobulin E-mediated reaction)
Children and adults: Scratch technique uses a 20-gauge needle to make a 3–5 mm scratch on dermis; apply a small drop of solution to scratch and rub it in gently with applicator. Intradermal injection of 0.1–0.2 mL of Pre-Pen and 0.9% saline in 2 sites at least 1 in apart.