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Description
Only a limited number of patients who were allergic to allopurinol have been studied to date, but the drug was tolerated in those patients
The worst rare side effects are pancreatitis (0.3%), gallbladder problems (1.4%), and acute kidney injury (0.7%), all occurring in under 2% of patients

Routine B12 testing is not recommended for asymptomatic individuals without risk factors
[DOI] [PMC free article] [PubMed] [Google Scholar] 342.Cha, Y

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