The objective of this study is to determine the efficacy of HKT-500 in subjects with acute shoulder pain

Randomized, double-blind, placebo-controlled, multicenter study in men and women 18 years of age or greater who have acute shoulder pain requiring analgesic treatment daily for at least 2 weeks.

Inclusion Criteria:

• The subject has unilateral acute shoulder pain.

Exclusion Criteria:

• The subject is a women of childbearing potential who has a positive urine pregnancy test, or who is lactating, or who is not surgically sterile (by tubal ligation or hysterectomy), or at least 2 years postmenopausal, and has not practiced an acceptable form of birth control (defined as the use of an intrauterine device with spermicide, a barrier method with spermicide, condoms with spermicide, subdermal implant, oral contraceptives, or abstinence) for at least 2 months prior to Visit 1.