The family of Ibrahim Halawa say he has been moved to hospital. The Dubliner was transferred from prison in Egypt on Tuesday, after falling ill.
The 21-year-old, who has been held without trial for almost four years, is being treated for a heart problem, which has deteriorated.
Ibrahim's family in Dublin say he is still on hunger strike, and has been refusing water. The Firhouse native says he will not end his hunger strike until he is safely released from prison in Egypt and sent back to Dublin.
The Halawa family say they appreciate what the Irish Government has been doing for Ibrahim, but feel it "must do something different and be tougher. It’s time they put a deadline on this”.
"His health is not good. He is on hunger strike. How much longer? We feel that we are losing him", the statement continued.
The Department of Foreign Affairs says it is looking into the family's claims.
Ibrahim was arrested at a political protest in Cairo in August 2013 while on a family holiday after his Leaving Cert. His mass trial has been delayed 19 times.