The concomitant use of oxymetazoline containing nasal drops and medicines with hypertensive effect (e.g. MAO-inhibitors and tricyclic antidepressants) may lead to an increase in blood pressure due to their cardiovascular activity. Overdosage or swallowing of Iliadin and use of tricyclic antidepressants or MAO-inhibitors simultaneously or immediately prior to administration of Iliadin drops can lead to an increased blood pressure.