97Moreover, the fact that PPIs exercised a considerable competitive constraint over H2 blockers and, consequently, that PPIs belonged to the H2 blocker market between 1991 and 2000 is irrelevant in the context of this case, since it does not mean that H2 blockers exercised a significant competitive constraint over PPIs and, therefore, that H2 blockers belonged to the PPI market. The definition of the relevant market consists, in the present case, only in identifying the significant competitive constraints on PPIs during the relevant period and is therefore not concerned with the competitive constraints that PPIs might have exercised over other products. As the Commission rightly observed in recital 493 of the contested decision, it is clear from paragraph 3 of the Notice on market definition that the concept of relevant market is different from other definitions of market often used in other contexts, such as the area where the companies sell their products or, more broadly, the industry or sector to which the companies belong. Thus, the fact that H2 blockers were Losec’s primary competitive focus does not mean that H2 blockers exercised a significant competitive constraint over Losec.
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