Sensitivity of topical drugs.. Paraminophenic acid derivatives. Benzocaine. Amethocaine. Procaine. Dipocaine. Carbocaine. Lignocaine. Zilocaine

Topical drugs:
Paraminophenic acid derivatives such as benzocaine, amethocaine, broccaine and dipocaine are powerful sensitizers.
Mibe fakine (carbocaine) and lidocaine (lignocaine and zilocaine) appear to be rare sensitizers.