Ethnic Differences in Response to Topical Capsaicin: A Psychophysical Study on Healthy Subjects

Exclusion Criteria

• •Adults over age 50.
• •Children less than 18 years of age.
• •Unable to complete the required measures.
• •Diagnosis of diseases that would affect the measurement of pain perception.
• •Currently enrolled in any investigational study in which the subject is receiving any type of drug, biologic, or non-drug therapy and subjects undergoing treatment with another investigational drug or approved therapy for investigational use within 30 days prior to study participation.
• •Use of oral analgesic or other medications known to interfere with pain perception in the week prior to the study.
• •Use of emollient on the forearms on the day of the study visit.
• •Use of medicated topical preparations on the forearms for the week prior to the study.
• •Known history of neuropathy causing diseases such as uremia.
• •Known history of uncontrolled thyroid disease.
• •Known history of diabetes mellitus.
• •Allergy to capsaicin.
• •Pregnant women.