The Botswana Medicines Regulatory Authority (BoMRA) would like to inform you about a safety concern regarding medicines containing pseudoephedrine. Pseudoephedrine is used to relieve nasal, or sinus congestion caused by the common cold, sinusitis, and hay fever and other respiratory allergies. Recent evidence suggests a potential risk of posterior reversible encephalopathy syndrome (PRES) and reversible cerebral vasoconstriction syndrome (RCVS) associated with the use of these medicines containing pseudoephedrine.