Comparison of the Efficacy and Tolerability of Solaraze for 3 Versus 6 Months in Patients With Mild to Moderate Actinic Keratosis Located on the Face and Head

Inclusion Criteria: Visible and histologically proven actinic keratosis Prepared and able to give written informed consent ≥ 18 -80 years of age Prepared and comply with all study requirements, including the following: application of gel on the treatment area twice a day, 5 / 7 clinic visits during the prestudy, treatment, posttreatment, and follow-up period Pre- and posttreatment biopsy for histological confirmation (of clearance) of actinic keratosis diagnosis Exclusion Criteria: Data of clinically significant, unstable, cardiovascular or haematologic, hepatic, neurologic, renal, endocrine, collagen-vascular, or gastrointestinal abnormalities or diseases Known allergies to any excipient in the study drug Any dermatological disease and/or condition in the treatment or surrounding area (3 cm distances from treatment area) that may be exacerbated by treatment with diclofenac or cause difficulty with examination Active chemical dependency or alcoholism, as assessed by the investigator Currently participating in another clinical study or have completed another clinical study with an investigational drug within the past 30 days Received topical treatment at the treatment area with imiquimod or 5-FU within a time period of 1 month Invasive tumours within the treatment area, e.g. merkel cell carcinoma, squamous cell carcinoma, basal cell carcinoma, the latter is accepted if completely surgically removed