• Ciara O'Shea and Rizwan Khan.
• Department of Neonatology, University Maternity Hospital Limerick, Limerick, Ireland. ciaraoshea1@gmail.com.
• Ir J Med Sci. 2022 Aug 1; 191 (4): 1717-1724.

AimsGastro-oesophageal reflux (GOR) and cow's milk protein intolerance (CMPI) are two frequently occurring conditions found in infancy. The aim of this review is to examine the association between the two.MethodsA literature review was conducted via PubMed, Sciencedirect and Google scholar using search terms "gastro-oesophageal reflux" + "cow's milk protein intolerance". The inclusion criteria were studies from 1985 to present, studies involving infants and studies involving both GOR and CMPI. Exclusion criteria were studies not including infants, or studies involving GOR or CMPI independently.ResultsThis review revealed varying degrees of co-existence of GOR and CMPI. Iacono et al., Farahmand et al., Kamer et al., and Semeniuk and Kaczmarski, displayed co-occurrence of GOR and CMPI in 41.8%, 33.3%, 46.5%, and 44.9% of infants respectively. In two separate studies by Cavataio et al., concomitance was apparent in 41.6% and 30% of infants. Others suggested a less significant link at 16-20%. Nielsen et al. found 18/42 children to have severe GORD, 10 of whom had CMPI in addition.ConclusionThis review highlights an association between GOR and CMPI. CMPI should be considered, particularly in cases of reflux resistant to pharmacological therapy, as a co-existing or causative entity accounting for symptoms.© 2021. Royal Academy of Medicine in Ireland.

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