After the recent 2013 MEDLINE reload, an issue was found where links between the MeSH® terms for the drug classes and the specific narrower drug terms in the pharmacologic actions tree were disconnected during the global reload. Customers utilizing the pharmacologic actions limit may need to run their saved searches again once this issue has been resolved.
We are currently working to resolve this issue as soon as possible and will notify users when this has been corrected.
We apologize for any inconvenience this issue may have caused you and your patrons. If you should have any questions, please contact us at firstname.lastname@example.org.
Vice President, Customer Support
Wolters Kluwer Health Medical Research - Ovid