Bioequivalence Study to Compare Sol-Gel Technologies' 5-FU Cream With Efudex® (5-FU) Cream

A Multi-Center, Double-Blind, Randomized, Vehicle-Controlled, Parallel-Group Bioequivalence Study to Compare Sol-Gel Technologies' 5-FU Cream, With Efudex® (5-FU) Cream, and Both Active Treatments to a Vehicle Control, in the Treatment of Actinic Keratosis

To compare the relative efficacy and safety and of 5-FU Cream to the marketed formulation Efudex® (5-FU) Cream, and to demonstrate the superior efficacy of the two active formulations over that of the Vehicle Control Cream, in the treatment of actinic keratosis.

To compare the safety and efficacy profiles of 5-FU Cream with Efudex® (5-FU) Cream, and to demonstrate the superior efficacy of the two active formulations over that of the Vehicle Control Cream, in the treatment of actinic keratosis.

Inclusion Criteria:

1. Male and female 18 years of age and older.
2. Subject is able to understand and willing to sign Institutional Review Board (IRB) approved written informed consent for this study.
3. Subject must be generally healthy, based on medical records, and free from any clinically significant disease, other than AK, that in the opinion of the investigator might interfere with the study evaluations.
4. At least five (5) and no more than ten (10) clinically typical, visible or palpable, discrete AK lesions, each at least 4 mm in diameter on the face (excluding ears), forehead or bald scalp.

Exclusion Criteria:

1. Subject is pregnant, lactating, or is planning a pregnancy within the period of study participation.
2. Subject suffers from excessive alcohol consumption, drug abuse or has a condition that could compromise the subject's ability to comply with study requirements.
3. Presence of Atopic Dermatitis, Basal Cell Carcinoma, Eczema, Psoriasis, Rosacea, Squamous Cell Carcinoma or other possible confounding skin conditions on the