In reply: As a practising physician, Morton clearly understands the issues faced by prescribers and consumers regarding drug categorisation in pregnancy.1 Currently, the Therapeutic Goods Administration provides no references for the data on which it bases its drug categorisations for pregnancy. It is therefore left to the conscientious prescriber to try to find the data (not always easy or obvious) and then attempt to interpret it in a clinically relevant way. The more narrative approach suggested by Morton is an improvement but would still need clinical context and interpretation for optimal use.
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