From May to August of 2013 we carried out a descriptive cross-sectional study in two pharmacies in Guatemala City. We used purposeful sampling to select two private pharmacies serving different segments of the population according to key informants from pharmacy staff members. The first pharmacy was located in San Cristobal (zone 8 of Mixco, according to the local nomenclature), a suburb that is part of the city’s metropolitan area serving clients characterized as professional or executive employees with higher levels of education and higher purchasing power. The second pharmacy, located in historical City Center (zone 1, using the local nomenclature), serves clients generally characterized as being working class and with lower levels of education and lower purchasing power.