Efficacy and Safety Study of Adalimumab in the Treatment of Hidradenitis Suppurativa

The clinical trial identifier is PIONEER II. The purpose of this study is to evaluate the
safety of adalimumab and to determine how well it works in the treatment of adults with
moderate to severe hidradenitis suppurativa (HS). HS is a chronic skin disease that creates
red, swollen, painful bumps which can break open to combine and form tunnels in the skin and
scars. Sometimes these bumps can heal themselves quickly and sometimes they will become
much worse and create sores that heal with multiple combined scars, or areas that do not
heal. In this study, approximately 300 adults will be enrolled at treatment centers
worldwide. Subject participation in this study will be up to 50 weeks. There will be a
screening period, which will last from 7 to 30 days, and a study treatment period of up to
36 weeks. Study visits occur at Screening, Baseline, and Weeks 2, 4, 8, 12, 14, 16, 20,
24, 28, 32 and 36 (or sooner if subject leaves the study before Week 36). The study is
divided into two treatment periods. The first period (Period A) will last 12 weeks and the
second period (Period B) will last 24 weeks.

Inclusion Criteria:

- Adults must have a diagnosis of hidradenitis suppurativa (HS) for at least 1 year
prior to Baseline.

- HS lesions must be present in at least two distinct anatomical areas, one of which
must be at least Hurley Stage II or Hurley Stage III.

- Subject must have stable HS for at least 60 days prior to Screening visit and at
Baseline visit.

- Subject must have experienced an inadequate response to at least a 90 day treatment
of oral antibiotics for treatment of HS.

- Subject must have a count of greater than or equal to 3 at baseline.

Exclusion Criteria:

- Subject was previously treated with adalimumab or another anti-TNF therapy (e.g.,
infliximab or etanercept).

- Subjects on permitted oral antibiotic treatment for HS who have not been on a stable
dose for at least 28 days prior to the Baseline visit;

- Subject received oral concomitant analgesics (including opioids) for HS-related pain
within 14 days prior to Baseline visit.

- If entering the study on concomitant oral analgesics for non-HS related pain:

- Subject on opioid analgesics within 14 days prior to Baseline visit;

- Subject not on a stable dose of non-opioid oral analgesics for at least 14 days
prior to the Baseline visit ("as needed" is not considered a stable dose).