Although pharmacology is a significant component of travel health nursing, the vast majority of travel health nurses require additional certification to prescribe medicine.[1][11][12] The ability to prescribe requires appropriate training and professional development: reliable, up-to-date and recognized sources; an understanding of the restrictions associated with prescriptions, patient group directions (PGDs) and patient-specific directions (PSDs), and the principles of risk assessment and their application to the traveler.[4] Practitioners accept full responsibility in recommending, administering and prescribing vaccines and medicine.[11]