People who choose not to eat animal products may be unaware that common medicines could contain them, a study suggests.
Many tablets and liquid medicines use gelatin, derived from animal bones or skin.
A survey in the Postgraduate Medical Journal shows a quarter of patients are unknowingly prescribed drugs containing gelatin contrary to their beliefs.
The report authors say clearer drug labelling is needed.
Read More: Many drugs ‘non-vegetarian and need better labelling’