Allergan, Inc. has entered into a definitive agreement to acquire SkinMedica, Inc. for $350 million up-front and an additional $25 million based on sales targets for acquired products. The acquisition includes SkinMedica’s topical aesthetics skin care business, which includes a variety of physician dispensed non-prescription aesthetic skin care products and prescription products.   Allergan plans to operate SkinMedica as a separate global business. Bob Rhatigan, who currently serves as senior vi...