This document presents an analysis of the effect of mergers on competition and prices, in the framework of a merger between two representative isotonic drinks producers. In particular, between Brand 3 and Brand 4. Given the descriptive analysis and the econometric excercise presented, it is possible to conclude that there is no evidence of a possible exploitative effect in the market as no price-increasing pressures were found as a result of the merger. This documents constitutes a relevant microeconometric tool to be used for the analysis of mergers in Colombia.