On 19 October 2022, an Embraer E175-200 had just departed Dublin when the First Officer, who was acting as ‘Pilot Flying’, became incapacitated. The Captain immediately took over all flying duties, requested assistance for the First Officer from the cabin crew and declared a MAYDAY. The aircraft then returned to land without further significant event although a bird strike occurred on approach. The 35 year-old First Officer was medically assessed and the conclusion was that he had “low blood pressure (and) a possible lack of water and food” which would have been exacerbated by the rising cabin altitude after departure.