Abstract

Medicinal products contain not only active drugs but also other ingredients included for a variety of purposes and collectively known as excipients.¹ People who wish to avoid a specific substance because of an allergy or intolerance may ask a healthcare professional about the constituents of a medicine and whether an alternative is available. In a previous article we discussed the issues facing people who wish to avoid certain substances for religious or cultural reasons.² Here, we provide an overview of several dietary conditions and the pharmaceutical issues that need to be considered by healthcare professionals advising on the suitability of a medicine.