EMA Issues Advice for Potential Early Use of Pfizer’s Novel COVID-19 Oral Antiviral Candidate

Pfizer Inc. announced that the Committee for Medicinal Products for Human Use (CHMP) of the European Medicines Agency (EMA) issued advice on the use of PAXLOVID (nirmatrelvir [PF-07321332] tablets and ritonavir tablets), stating that PAXLOVID can be used to treat adults with COVID-19 who do not require supplemental oxygen and who are at increased risk of progressing to severe disease. The CHMP also recommend that PAXLOVID should be administered as soon as possible after diagnosis of COVID-19 and within five days of the start of symptoms. The EMA issued this advice under Article 5(3) of Regulation 726/2004 to support authorities of European Union (EU) Member States who may decide to allow the supply and use of PAXLOVID, for example in emergency use settings, prior to EU conditional marketing authorization. PAXLOVID is currently not authorized for use in the EU.

“The CHMP’s advice signifies the strength of our data for PAXLOVID in the treatment of high-risk adults diagnosed with COVID-19,” said Albert Bourla, Chairman and Chief Executive Officer, Pfizer. “COVID-19 continues to take lives at an unprecedented pace globally and exacts a devastating toll on health care systems. If authorized, PAXLOVID has the potential to help save lives and reduce hospitalizations. We look forward to working with the EMA and other regulatory agencies worldwide to bring this potential treatment to patients as quickly as possible.”

The CHMP based their advice on positive results from the Phase 2/3 EPIC-HR (Evaluation of Protease Inhibition for COVID-19 in High-Risk Patients) interim analysis, which enrolled non-hospitalized adults with confirmed COVID-19 who are at increased risk of progressing to severe illness. The data demonstrated an 89% reduction in risk of COVID-19-related hospitalization or death from any cause in patients treated with PAXLOVID compared to placebo within three days of symptom onset, with no deaths in the treatment group. Similar results were seen with those treated within five days of symptom onset. Treatment-emergent adverse events were comparable between PAXLOVID (19%) and placebo (21%), most of which were mild in intensity. Pfizer recently announced that results from the final analysis of the primary endpoint from all patients enrolled in EPIC-HR were consistent with the interim analysis, confirming robust efficacy and a similar safety profile.

Pfizer has also initiated rolling submission with the EMA for potential EU conditional marketing authorization of PAXLOVID. If authorized, PAXLOVID could be prescribed as an at-home treatment to high-risk patients at the first sign of infection, potentially helping patients avoid severe illness which can lead to hospitalization and death. PAXLOVID is also being studied in adults at standard risk of progressing to severe illness, as well as in adults who have been exposed to the virus through household contacts.