The main reasons colloidal silver fell out of use as an antiseptic are due in large part to the advent of antibiotics, uncertain safety, and the production of argyria on ingestion10. Although it is not yet known which dose of silver is required to cause argyria, all case reports to date are following excessive daily consumption of the element over a period of years10,11. Topical application of silver has been reported to cause localized argyria whereas systemic toxicity is generally the result of longstanding oral intake12. Argyria is more or less a benign condition characterized by a slate-grey metallic appearance of the skin. Apart from skin discoloration, extreme cases of systemic silver toxicity can be associated with thrombocytopenia, abnormal clotting, renal impairment, proteinuria, and neurological symptoms such as seizures, loss of coordination and sensory loss12. All of these possible side effects are exceedingly rare and are not expected to be an issue in this study. There is, however, a possibility that there might be localized pigmentation of the nasal mucosa, of which there are no significant consequences13.