Grundlaget for indbringelsen af sagen var, at der var forskelle, deriblandt kvalitetsmæssige aspekter, i de produktresuméer af Singulair og tilknyttede navne, der var godkendt i de forskellige EU- medlemsstater, med hensyn til følgende indikationer:
The basis for referral was that there were divergences in the Summaries of Product Characteristics (SPC) including quality aspects of Singulair and associated names approved across EU Member States, with respect to the following indications: