EXTON, Pa., Dec. 15 /PRNewswire-FirstCall/ -- ViroPharma Incorporated (Nasdaq: VPHM) today provided the following update regarding Vancocin(R) (vancomycin hydrochloride capsules).
The Food and Drug Administration (FDA) has posted draft guidance for establishing bioequivalence (BE) to Vancocin. The new draft guidance is open for public comment, and if finalized as proposed would add new requirements for generic applicants beyond the in vitro dissolution testing originally proposed in March 2006. Under the draft guidance, generic applicants will also have to show that their products contain substantially the same inactive ingredients in substantially the same quantities as Vancocin. For generic versions of Vancocin that are not Ql and Q2 the same as Vancocin with respect to inactive ingredients, FDA is recommending in vivo BE studies with clinical endpoints in patients with Clostridium difficile.
Importantly, FDA has also called for public process specific to Vancocin, announcing that there will be a 60 day public comment period to review and comment on these draft guidance. FDA has acknowledged the complexity of the issues involved, and specifically stated that they will carefully consider such comments before responding to ViroPharma's Citizen Petition and finalizing BE recommendation for Vancocin.
Nowhere in the draft guidance does it indicate that FDA has correlated the described in vitro tests to an in vivo outcome, as required by FDA's regulation. A detailed description of this topic can be found at the following link (please cut and paste into your browser):
http://www.regulations.gov/fdmspublic/component/main?main=Document
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