NEW YORK ( TheStreet) -- Walgreen ( WAG) reported a 2.8 % jump in December same-store sales, falling short of expectations. The drugstore saw a 3.6% boost from front-end same-store sales, which include discretionary items like cosmetics and food. This marked the biggest gain for the division in over a year. Pharmacy comparable sales rose 2.2%. Analysts expected December same-store sales to gain 3.3%. On Tuesday, rival Rite Aid ( RAD) posted a 0.6% uptick in comparable sales for the month, better than the 1% decline Wall Street forecast. --Written by Jeanine Poggi in New York. >To contact the writer of this article, click here: Jeanine Poggi. >To follow the writer on Twitter, go to http://twitter.com/jpoggi. >To submit a news tip, send an email to: firstname.lastname@example.org.