Pseudoephedrine-Induced Risks of Posterior Reversible Encephalopathy Syndrome and Reversible Cerebral Vasoconstriction Syndrome

Abstract Background Pseudoephedrine is a sympathomimetic drug used as a nasal/sinus decongestant in common cold remedies. Objective The purpose of this review article is to discuss the pseudoephedrine-associated posterior reversible encephalopathy syndrome (PRES) and reversible cerebral vasoconstriction syndrome (RCVS), which have been reported to the Medicines and Healthcare products Regulatory Agency (MHRA) of United Kingdom and Pharmacovigilance Risk Assessment Committee (PRAC) and Committee for Medicinal Products for Human Use (CHMP) of European Medicines Agency (EMA). Materials and Methods The aim is to review the literature pertinent to PRES and RCVS linked to the use of pseudoephedrine; the literature was searched in databases such as Medline/PubMed/PMC, Google Scholar, Science Direct, Ebsco, Scopus, Web of Science, Embase, and reference lists. Results The review by MHRA of the United Kingdom and PRAC and CHMP of EMA, all available evidence, including postmarketing safety data, and a few case reports, have confirmed the rare risk of PRES and RCVS associated with the use of pseudoephedrine. Conclusion Health care professionals should be aware of pseudoephedrine-associated PRES and RCVS. Patients with severe or uncontrolled hypertension or those with severe acute or chronic renal disease should avoid using products containing pseudoephedrine.