Please note, this OEL/ADE monograph also applies to penciclovir hydrochloride (CAS RN 97845-62-0). Penciclovir is an antiviral topical cream indicated for the treatment of recurrent herpes labialis (cold sores) of the lips and face. Penciclovir is an acyclic guanine nucleoside analog that has demonstrated in vitro inhibitory activity against herpes simplex virus types 1 (HSV-1) and 2 (HSV-2), varicella-zoster virus (VZV) and Epstein-Barr virus. Penciclovir is phosphorylated via viral thymidine kinase to a monophosphate form, which is subsequently converted to penciclovir triphosphate by cellular kinases. Intracellular conversion to the triphosphate form is required for antiviral activity. In vitro studies demonstrate that penciclovir triphosphate competitively inhibits HSV polymerase with deoxyguanosine triphosphate. Inhibition of DNA synthesis of virus-infected cells suppresses viral replication. In cells not infected with HSV, DNA synthesis is unaltered due to phosphorylation occurring in only within herpes infected cells. Penciclovir is the active metabolite of the oral product famciclovir.

Affygility Solutions has an occupational exposure limit (OEL) and control band assignment for this active pharmaceutical ingredient (API). This monograph also contains the acceptable daily exposure (ADE) value.


CAS Registry Number:
Brand names:
Denavir®, Famvir®
$679 USD


Why do you need this OEL Fastrac monograph?

OEL Fastrac monographs are a cost-effective and convenient way to meet the requirements for PDEs (ADEs) contained in the EMA Guideline on setting health based exposure limits for use in risk identification in the manufacture of different medicinal products in shared facilities (EMA/CHMP/CVMP/SWP/169430/2012), as well as PIC/S and ANVISA requirements, and to obtain the following information:

  • The numerical OEL and control band assignment needed to determine the level of required engineering controls and personal protective equipment
  • A listing of all cited references utilized in the derivation of the OEL and ADE
  • An expert review and discussion with respect to the critical endpoints of concern, the rationale for the choice of endpoints, and dose that is to be used in the derivation of the ADE (PDE), as required by the EMA's Guideline on setting health-based exposure limits for use in risk identification in the manufacture of different medicinal products in shared facilities

Benefits of OEL Fastrac monographs

  • Fully documented. Over 20 pages in length, with calculations and cited references.
  • Save time! Unsurpassed delivery with instant download.
  • Save money. Similar documents cost 5-12 times as much.
  • Stay current. Automatic notification of revisions.

How to order

To order an OEL/ADE monograph for Penciclovir, just click the ADD TO CART button.


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Affygility Solutions’ OEL Fastrac service is an user-friendly system that enables us to make confident decisions and focus on moving the compound safely through our facility. We can quickly access the database to determine if a new drug is within the OEL Fastrac library, and if so, immediately download a detailed OEL banding report. The OEL Fastrac system has been a helpful tool in our overall EH&S program.
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