Protecting the poor metaboliser--from what?
D003647:Debrisoquin / Q000378:metabolism; D064420:Drug-Related Side Effects and Adverse Reactions; D006801:Humans; D006900:Hydroxylation; D008790:Metoprolol / Q000009:adverse effects / Q000378:metabolism; D004364:Pharmaceutical Preparations / Q000378:metabolism*; D010641:Phenotype
D004364:Pharmaceutical Preparations; D008790:Metoprolol; D003647:Debrisoquin