<qa>  What is the most common type of medication that is used for the study?- Intend to use over-the-counter or prescription medication within 7 days prior to dosing and during the study especially systemic glucocorticoids, immunomodulatory drugs, drugs with propensity for dermal reactions, drugs with known hepatic toxicity, etc. Stable doses of hormone replacement therapy HRT are allowed for inclusion at the discretion of the investigator 