PF-04531083 has been shown to reduce the amount of heat pain experienced by rats with skin that has been sensitized to heat by ultraviolet light. This study is designed to see if this is also true in man.

Inclusion Criteria:

• Healthy volunteers.
• Body mass index between 17.5 - 30.5 kg/m2 and body weight greater than 50 kg.

Exclusion Criteria:

• Subjects that have any condition possibly affecting drug absorption (eg, gastrectomy).
• Treatment with an investigational drug within 30 days (or as determined by the local requirement, whichever is longer) or 5 half-lives preceding the first dose of study medication.
• Subjects with inadequate cardiac function (ECG demonstrating prolonged QTc interval at screening).
• Subjects with inadequate or excessive sensitivity to UVB light.