The regulatory process for Simeprevir in the U.S.

Stockholm, Sweden — Medivir AB (OMX: MVIR) In March 2013, Medivir’s partner
Janssen Pharmaceuticals, Inc. (Janssen) filed a new drug application (NDA) with
the U.S. Food and Drug Administration (FDA) seeking approval for simeprevir for
a triple combination treatment of simeprevir combined with pegylated interferon
and ribavirin in patients infected with chronic genotype 1 hepatitis C. In May
2013, the FDA granted Priority Review to the new drug application for
simeprevir.

Next step in the regulatory process is scheduled to be on 24 October 2013 when
the FDA’s Antiviral Drugs Advisory Committee is scheduled to meet to review the
application for simeprevir.

The Committee is scheduled to meet from 8am to 5pm Eastern Standard Time (EST),
ending with a voting session. The outcome is typically announced by the FDA
after the meeting. Medivir will issue a press release about FDA’s announcement.
The FDA is then expected to make its final decision by end of November 2013.
That decision will also be announced through a press release.

A Briefing Book, which contains information about simeprevir and its clinical
studies, is available on the FDA website.

There is no planned trading halt in the Medivir share on 24 October 2013.

For more information please contact:
Rein Piir, EVP Corporate Affairs & IR Mobile: +46 708 537 292.

About Medivir
Medivir is an emerging research-based pharmaceutical company focused on
infectious diseases. Medivir has world class expertise in polymerase and
protease drug targets and drug development which has resulted in a strong
infectious disease R&D portfolio. The Company’s key pipeline asset is
simeprevir, a novel protease inhibitor for the treatment of hepatitis C that is
being developed in collaboration with Janssen R&D Ireland. The company is also
working with research and development in other areas, such as bone disorders and
neuropathic pain.

Medivir has also a broad product portfolio with prescription pharmaceuticals in
the Nordics.

For more information about Medivir AB, please visit the Company’s website:
www.medivir.com (http://www.medivir.com/)