The family of Ibrahim Halawa say he collapsed in his jail cell over the weekend.
The 21-year-old Dubliner has been held in Egypt without trial since August 2013, where his sister Somia says his condition is deteriorating every day.
The Minister for Foreign Affairs, Charlie Flanagan, confirmed that the Government arranged for a doctor to visit Ibrahim Halawa in prison last week.
"The doctor recommended further medical assessments and that Mr Halawa be released to facilitate such tests", the Minister said.
Minister Flanagan explained that the case "remains a high priority for the government and it continues to receive unprecedented attention and resources in Dublin and in Cairo".