Prosecutors have concluded questioning Egyptian MP and film director Khaled Youssef after he was stopped on Sunday from boarding a flight at Cairo International Airport for possessing 100 Xanax pills without a prescription, Al-Ahram Arabic website reported.

Youssef, who has been released on his own recognisance, was stopped from boarding a flight at Cairo International Airport for possessing 100 Xanax pills without a prescription, Al-Ahram Arabic website reported.

Security officials say that Youssef, who was set to board an EgyptAir flight to Paris, was stopped after the pills were discovered in his suitcase during security screening.

Youssef, who has been referred to the prosecution, says that he obtained the drug legally to give to his wife, who resides in Paris.

Youssef's doctor told prosecutors that the amount Youssef was carrying is the standard number of pills found in a large pack, which is not indicative of trafficking or addiction.

Xanax, which is used to treat anxiety, panic disorders and depression, is a schedule B controlled substance in Egypt and cannot be legally purchased without a doctor’s prescription.

Youssef won a seat in Qalyubia governorate's Kafr Shukr constituency in the second stage of the 2015parliamentary elections.

He is a member of parliament's left-leaning 25-30 bloc and an outspoken supporter of the 25 January Revolution that toppled long-time president Hosni Mubarak in 2011.

In December 2015, prominent TV host Ahmed Moussa aired images allegedly showing Youssef in “sexual situations” with a naked woman.

Youssef said at the time that the images are “100 percent fabricated.”

Following the incident, dozens of Egyptian journalists endorsed a campaign demanding legal action be taken by the Journalists Syndicate against Moussa, a strong opponent of the January 25 Revolution.

Moussa later apologised for airing “personal images” of the director.